You can use a
rodent bait in
tamper resistant bait boxes to control the rodents on your farm. The bait boxes will secure the bait so that only rats and mice will have access to it. In most cases, well fed cats and dogs will not eat a dead rodent. In the event that they do, they would need to eat 10 or more to have any effect from the bait that killed the rodent. You can treat for spiders and other insects using an insecticide such as
Talstar P.
Talstar P is safe to use around animals, is non-irritating and has a very broad label covering over 75 different insects. When applying any insecticide, remove the animals from the area that is being treated, spray the area, allow the area to dry and then the animals can safely return to the treated area.