Contrac All-Weather Blox Rodenticide Help - Questions and Answers

Asked by Gloria

04/12/2011

Q

I think my 10 lb dog ate a piece the size of a dime. Will it hurt him??

A

We recommend that you call your veterinarian immediately. We have linked the Contrac Blox product label and the Contrac Blox MSDS for you in our answer so that you may print them out and provide them to your vet.

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14 of 22 people found this answer helpful.

Asked by Mike

12/13/2018

Q

What is the difference between Final and Contrac?
What is the difference and which is better? Or would you reccomend First Strike?

A

Final Blox and Contrac Blox are pretty comparable, though Final Blox may actually kill the rat a bit faster. First Strike is a unique rodenticide bait that has shown high acceptance by rodents, even when competing food sources are available. The unique bait packaging around each bait allows the aroma to escape, increasing the attractiveness of the product, First Strike may be the better choice if you’re dealing with high activity and competing food sources.

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12 of 13 people found this answer helpful.

Asked by Ronnie from Baton Rouge, La.

03/05/2013

Q

Will horses eat Contrac Blox and will it hurt them?
I put some in a ceiling of a horse barn where the rats are nesting and I am finding some in the stalls. The rats are carrying them out of the ceiling and dropping them in the stalls. I was wondering what would happen if a horse ate one and if he would?

A

Horses and rats are both mammals and the bait will have the same effect on both of them. Of course a horse weighs a lot more so it would need to consume more of the bait to receive a lethal dose. We are not sure if horses would be attracted to the bait because it has not been tested for horses. Bait should never be tossed into spaces because of a rats tendency to move it around. In the future you should use piano wire to string the bait onto and then nail the wire down so the rats can not take off with the bait (for spaces that inaccessible to non-target animals and children only). For places that are accessible to children and non-target animals the bait should be placed in tamper resistant bait stations which will also prevent the rat from removing the bait.

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12 of 14 people found this answer helpful.

Asked by Tom from Medina, Oh

12/02/2014

Q

Allergy Reactions to Smelling Contrac Bait Blox
I understand the Contrac bait blocks do not give off a vapor, correct? Is it still possible for the odors from the bait when placed into an attic to weep through drywall and cause a reaction to a child (living in a room below the attic) who is highly allergic to various foods?

A

Contrac Blox Rodenticide do not emit any type of vapor. This product should not cause a reaction to a child unless they come in direct contact with it. Contrac Blox should be placed in tamper resistant bait stations. It will pose no threat to humans if it is used as directed.

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9 of 12 people found this answer helpful.

Asked by Paul from Spokane

05/29/2013

Q

How does the Contrac bait kill mice

A

Contrac Blox is an anti-coagulant which means once the mice eat this product they begin to bleed to death from the inside. The mice first become sick, and then grow tired and weak and pass in their sleep. It can take anywhere from a 1-5 days depending on how much the mice have eaten. They do not need water for the product to work.

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8 of 8 people found this answer helpful.

Asked by Cindy

10/07/2010

Q

How do I know when the mice are gone?
I have Contrac Blox throughout our house due to mice moving in with the cold weather. The first night a number of them disappeared - even from places I didn't think there were mice. Also, some were nibbled on and we trapped one mouse. How do I know if the bait worked or if they're no longer there? I don't know where the mice took the bait and there is no evidence of mice in the area except for the missing blox? Do I keep replacing the bait bloxs until they stop disappearing? Thanks

A

You should keep replacing the bait until the mice stop taking it. You need to place enough bait out each night so that there is left over bait in the morning. This will ensure that each mouse is able to receive a lethal dose. We also highly recommend securing the blox in a tamper resistant bait station so that the rodents cannot carry the bait throughout the house and deposit the blox in undesirable areas.

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7 of 10 people found this answer helpful.

Asked by Daniel from Gonzales, Ca

12/19/2015

Q

How long will Contrac bait stay fresh in plastic bag placed in bait box?

A

Once the container has been opened the Contrac has a shelf life for up to 1 year. If unopened the shelf life is up to 3 years. Bait placed inside bait stations should not be placed in plastic bags as this may deter rodents from consuming. Bait in bait stations should be replaced every 30 days or as needed for adequate rodent control.

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6 of 6 people found this answer helpful.

Asked by Gregory from Las Vegas Nv

08/13/2013

Q

Tackling a rat problem in an area accessible by kids, pets?
I recently moved to Las Vegas and rented a nice ranch style house in the North sector of town. In this subdivision, all of the houses are well maintained and most have swimming pools, in-ground sprinkler systems, palm trees and the back yards are separated by 6ft to 8ft concrete walls. My house is enclosed in the back. I have a pool and built in BBQ area and the front yard is open. I've seen coyotes and fox traipsing around in the area but no major birds of prey. While sitting in the pool the other night a friend and I noticed shadows on the surrounding wall so we flashed a light and were shocked to see rats using the tops of the walls as mini-highways. I have to assume the rats are migrating out from the sewer systems at night because of the cooler temps and to search for water/food. Most people have vegetation, trees along the back walls of their property. Vegas is a very hot desert climate, so water is #1 on the survival list. My first thought was that the pool water was attracting the critters. Then I realized that most people have BBQs, decks and eating areas in their back yards, so water may be only one of the factors. I am inclined to use food poison pellets because trapping doesn't seem to be as effective as bait. Problem is, I'm not sure which is best for this scenario. Friends and family (and their pets) visit and of course the pool and back yard has trees, bushes, rocks on the outer edges and is the focal point for get togethers. My worry is that a child or pet will inadvertently come in contact with the poison. Appreciate your recommendations.

A

Contrac Blox is usually preferred in areas with pets and/or children as there is a readily available antidote in the event of accidental ingestion and because of the reduced risk of secondary poisonings (if one of your dogs were to eat a poisoned mouse). Final Blox is used when a fast clean out is needed as it will kill the rodents a bit faster than the Contrac Blox. Final Blox does have a higher risk of secondary poisoning but also has an antidote. We always recommend that you use tamper resistant bait stations that will help stop accidental poisonings of non-target animals and children no matter which bait you select. Please take a moment to read our article for baiting tips for rats

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6 of 6 people found this answer helpful.

Asked by Mike

07/08/2010

Q

Will Contrac Blox spoil quickly in the heat?
I'm in Utah, and I'm using the Protecta bait stations (that look like rocks) with Contrac Blox inside. The daytime temperatures have been as high as 100 Fahrenheit, probably much higher inside the stations. Will this affect the toxicity and/or taste appeal to rats? Very little has been nibbled on, although each nibble seems to have produced a dead rat in the yard. We still have lots of rats which we see every evening/morning. Has the bait lost it's taste appeal after sitting in the bait stations in the hot sun for only 1 or 2 days? It appears that some of the bait has melted just slightly. Should I replace this melted bait, or any bait left in the hot sun for just a few days?

A

The Contrac Blox should not spoil from the heat, though as you have noticed it will start to melt if it gets too hot. We recommend that you replace the bait if it starts to mold or if insects have started to infest it. Rats are notoriously cautious and suspicious of new food items and some can take several weeks, even months before they will accept it. Are other food sources available to the rats? Try to eliminate alternate food sources if at all possible, rats will continue to feed from the "tried and true" food sources that they have used in the past. You also need to be sure that you have offered enough bait stations to accommodate the rat population on your property as rats can also be territorial.

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6 of 6 people found this answer helpful.

Asked by David from Twin Falls, Idaho

08/02/2013

Q

How many blocks comes in the 4x4 Contrac Blox and how many blocks come in the 18lb bucket?

A

Each 4 lb. pail of Contrac Blox contains approx. 64 (28 gram ea) 2 in. x 1 in. x 1 in. blox, so each case would have 256. Each 18 lb. pail contains about 288 blox.

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5 of 5 people found this answer helpful.

Asked by Russ from El Cajon Ca

03/21/2012

Q

Should I be concerned about secondary poisoning when using Contrac Blox?
I am worried the neighbors cat may eat a poisoned rodent. I will be using Protecta Bait Stations.

A

The risk of secondary poisoning with Contrac Blox is very minimal. A rodent only consumes a very small amount of bait at a time and passes it very quickly only keeping a smaller amount in their liver until they succumb to the effects of the bait. A cat would have to actually eat 20-30 rodents that have consumed the bait for it to have an effect. In most cases well fed domesticated animals will not actually eat a mouse or a rat that they come across. Instead they will play with it, chew it and then leave it behind.

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5 of 5 people found this answer helpful.

Asked by Sheryl from Munfordville

12/17/2015

Q

Can Contrac Blox Rodenticide be stored in an unheated garage?

A

As a general rule we advise to store Contrac Blox Rodenticide and other rodenticides at room temperature, out of extreme heat or cold temperatures, to keep the product fresh. The food attractants in the bait will grow stale over time, making the bait less attractive to target rodents, so baits are best used within 1 year of opening. If the garage area is cool, dry, and out of direct sunlight, then this storage should be fine.

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5 of 6 people found this answer helpful.

Asked by Mary from Reseda, Ca

10/29/2013

Q

Roof Rats are stealing my bait. How long does it take for Contrac blocks to break down outside?
I am trying to make sure how long the bait will take to biodegrade outside so I do not have to be concerned about friend's pets in my backyard. Will rain accelerate the process?

A

There is no defined time for the Contrac Blox to breakdown. The more moisture and direct sunlight the exposed blocks receive, the faster they will breakdown. The actual active ingredient will last until the bait has disintegrated. For future baiting it is important to secure the bait so that it cannot be carried off. If baiting in an inaccessible area you can lace the blocks on to a thick wire so it cannot be moved. If the bait is used in an exposed areas you can secure it in tamper resistant bait stations.

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5 of 5 people found this answer helpful.

Asked by Young from Hot Springs, Arkansas

01/31/2018

Q

How many Contrac All-Weather Blox does it take to kill one rat or mouse?

A

Contrac Blox is a single feed rodenticide. Single feed means a rodent can consume a lethal dose of Bromadiolone in one feeding, resulting in death within 1-5 days. The number of blox you will use is undeterminable because the rat/mouse has to locate and consume the bait. How much bait you need will depend on the size of the rodent population, age and health of the rodents, and how much competing food is available to the rodents.

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5 of 10 people found this answer helpful.

Asked by David from Bronx,ny

09/27/2013

Q

How often should I change my Contrac Bait?

A

It is recommended to change Contrac bait out every 40-60 days if not eaten. Very cold or warm temperatures will mold or sour the bait faster. There are some instances when rodents can be resistant to a certain active ingredient in a bait and there may be instances where the rodents will avoid the bait all together (bait is old or spoiled, too many alternate food sources are available). We recommend changing to a bait with a different active ingredient every 4-6 months so that you will have fresh bait and you can avoid any issues with resistance.

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5 of 5 people found this answer helpful.

Asked by Neil from Nyc

12/11/2011

Q

How long does it take a rodent to die after consuming Contrac Blox?
I live in a row how with a 1st floor extension (slab on grade), and I thought I had a rat problem, Used Contrac in the Basement, and I baited the ceiling by wire stringing 3 blocks and letting a length of wire hang from the ceiling. Every day, I would check to see if the wire moved. Recently, I noticed that the wire moved about 8 inches into the ceiling and then I heard subsequent scratching later in the day. Now, I keep baiting the ceiling and I keep seeing the wire moving! (It's been about 3 days). I hope it's only one rodent as I heard scratching only in one specific place. Questions. 1. Do rats stop and gnaw or do they drag the food back? I had 3 blocks wired in series and now I can't even see them in the ceiling in the hole that was made. 2. How long does it take for rodent to die? I know that it depends on ingestion, but, if a rodent takes a bite of the bait, will it die eventually? It's been driving me crazy! I will have to eventually crack the ceiling open and look for points of entry, as it is a point of curiosity. It has just turned really cold as well. Any suggestions?

A

After eating a lethal dose of Contrac Blox it can take 3-7 days for a rodent to die. Rodents will sit and gnaw the bait if it is held in place so that they cannot simply carry it away. If the bait is not secured there is a good chance the rodents will carry it back to their nesting area. We recommend you read our articles How to get rid of Roof Rats and also How to rodent proof your home. Because you live in a row house we also recommend speaking to your neighbors and sharing this information. Without their cooperation you may not be able to control the rodent population around your home.

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4 of 4 people found this answer helpful.

Asked by Fabiola from Chicago, Il

04/25/2018

Q

Is Contrac All-Weather Blox Rodenticide harmful if consumed by a dog?

A

Contrac Blox can be toxic to animals if enough is consumed, although an antidote, Vitamin K1 is readily available from your vet. If you believe your pet consumed any amount of this product, it is important to contact your vet or pet poison control as soon as possible

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4 of 4 people found this answer helpful.

Asked by Carl from Tx

08/27/2016

Q

How many blocks are in the 18 lb buckets of Contrac?

A

There are approximately 288 blocks of Contrac Blox in the 18 lb pail.

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4 of 4 people found this answer helpful.

Asked by Alex from Cincinnati

03/14/2015

Q

If I get Contrac Blox, can u tell me if the mice or rats will die in walls or will they go outside to die?
I live in an apartment and would like to know what I'm facing here. Place is infested!

A

Rodents that eat the ContracBlox will not neccessarily go outside to die. There is a high possibility they will die indoors and then you will be dealing with a very foul odor for atleast a few weeks. We would recommend trapping rodents indoors using snap traps or glueboards. Trapping eliminates odor problems by allowing you to dispose of the carcass. Please read over our article regarding eliminating rodents indoors.

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4 of 6 people found this answer helpful.

Asked by David

09/30/2014

Q

Insects eating Contrac Blox Rodenticide
I have Contrac Blox Rodenticide inside Protecta Evo Ambush bait stations, and it appears that insects are eating the bait. I put these out last year, and I didn't notice any signs of insects eating the bait at that time (I change the bait every 4 months). Recently, all of the bait was gone, and I replaced it and rechecked the next week to find them covered in insects. Any ideas/suggestions?

A

Insects are trying to fatten up for the winter. It is not uncommon for insects to be more attracted to rodent bait like Contrac. We recommend to sprinkle Niban Bait around the outside perimeter of the bait station to keep the insects out.

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4 of 6 people found this answer helpful.

Contrac All-Weather Blox Rodenticide - Questions & Answers

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