Terad3 is very effective for rat and rodent control. Rats will not be an overnight fix - so be prepared to be patient, as it can take a few weeks for all of the rats to die off (depending how many you have). Also, when using a bait such as Terad3, you cannot guarantee where the rodent will die. The only way to guarantee where it will die is by using traps. Consider the T-Rex Rat Traps.
Terad3 Blox is an excellent bait choice if you are concerned about secondary poisoning, such as your dogs eating rodents that have consumed the bait, since it is designed with this type of situation in mind. Of course, you should always use baits in tamper-resistant stations and store baits out of reach of children and non-target animals. For indoor areas such as a crawl space, we would recommend using traps such as the Catchmaster Easy Set Rat Snap Trap so that you can easily locate and remove dead rodents. Please see our Rat Treatment Guide for additional tips and information.