Is Bob a dog?

or; "Are you a Puppy?"

No, he is a hamster.

This is a common error, one that Bob has to deal with quite often. The main cause of this confusion seems to be Bob's skinny stature, which seems plausible for a puppy, but rather out of place for a hamster, as hamsters have something of a reputation for being pudgy. Bob however, thanks you not to apply species-related stereotypes to him based merely on his physical fitness in relation to other hamsters.