Reptscue, good point on the Ivermectin. It's fatal to many turtle and tortoise species and eastern hognose snakes because it crosses the blood/brain barrier. There is a very narrow safety margin in other herps before it causes neurological problems.
It's illegal to use Ivermectin on animals weighing less than 5 pounds here in Pennsylvania.
Marisa, I use Revolution for my cat and it works like a charm. Just be sure that your cat doesn't come in contact with your herps for the day as a dose that is safe for mammals is a significant overdose in reptiles and the stuff can rub off onto other animals. The active ingredient was never tested on reptiles as far as I know and might not be safe at any dose.
The Zombie Mama is here!