My russian dwarf hamster ,Rango, has many dark green bumps on his tummy and we just noticed this it looks like it might hurt but she's acting very normal? My hamster is losing weight also her tummy is damp. It might be a skin infection but were not sure. Theirs about 6 bumps by the hamsters bottom legs. The hamster is running on the wheel and then slows down randomly. The bumps are small but puffy.

