Animal Assistants is a company that provides animal assistants to disabled people.
After seeing Apu with his helper monkey, Homer visited Animal Assistants to get a helper monkey, too. However, the attendant didn't give him a monkey, as Homer wasn't disabled. Homer brought Abe there to give him Mojo the Helper Monkey and then took it home.
When Mojo became overweight from overeating and lack of exercise, Marge made Homer take Mojo back to the company. Homer returned Mojo, dropping him off anonymously at the door. The attendant, alarmed by Mojo's condition, handed him a keyboard to type what was wrong. Mojo entered "PRAY…FOR…MOJO."