Can a cat overdose on amoxicillin?

Well, honey, anything is possible, but it's pretty rare for a cat to overdose on amoxicillin unless they've been chugging it like it's milk. Cats are pretty good at regulating their own doses by either refusing to take it or barfing it up. But hey, if you suspect your feline friend has had too much of the good stuff, best to call the vet and not rely on Dr. google.