Amoxicillin is an antibiotic, and a type of penicillin.  Potassium clavulanate increases its effectiveness against certain types of bacteria.  The combination, called a potentiated penicillin, is used to treat susceptible bacterial infections in many species.  Do NOT use Clavamox in rabbits, guinea pigs, chinchillas, or hamsters since it will affect the normal bacteria in the gastrointestinal tract and possibly cause a fatal diarrhea.  Contact your veterinarian if your pet experiences vomiting, diarrhea, or incoordination while being treated with Clavamox.