I love going to PetCo. I recently bought a Doggie Toothbrush set there and it has made a world of difference!
I will soon be buying a pet rat and ALL of the equipment there, as will two of my friends that I have recently convinced (except "Friend One" is getting a guinea pig, and "Friend Two" is getting a ferret... His favourite-animal-of-all-time-except-for-llamas!).
I also have found the staff very polite (unlike SOME stores I could mention!) and knowledgeable in the small animals department.
If you are reading this review and do not agree with my beliefs, please don't just go around and complain to your friends, WRITE YOUR OWN.
ADIOS AMIGOS! (I don't speak Spanish, so I probably spelled that wrong, if so: sorry!)

This store has been alot of FUN for my family. We have taken our dog in there several times, and they always welcome her, and seem to be glad to see her more than us! The kids especially LOVE this store!