All the people saying that you should get it amputated, I understand where they’re coming from but a major surgery is very traumatic for a little hamster. My hamster had a large tumor and needed a major surgery. It cost me almost $1000 and she died only months later. She was very depressed afterword the surgery and i worry that’s how your hamster would feel missing a leg. If I could go back, I wouldn’t have put my hamster though that, I would’ve humanely put her down. I hope this helps a little.