A black bump first grew on her chest, then got bigger and turned green-what’s the treatment?
Expert Answer
From your description, the hamster’s bump turning green is likely the color of pus, indicating an infected, abscessed wound from bacteria, usually causing local swelling, pain, inflammation, and pus buildup. Take the hamster to an exotic-pet or emergency animal hospital for examination and treatment; the vet may drain pus, debride and disinfect, and give antibiotics.
A pus wound needs professional care to prevent spread and worsening; self-treatment may further infect it. If you insist on home care, prepare peroxide, iodine, gauze, and erythromycin ointment, and clean and redress the wound by flushing with peroxide and gauze then applying antiseptic-two people should restrain the hamster to avoid bites, and prevent licking or scratching throughout.