My mouse has had a tumour growing since october, but in the past 2 weeks she's gained 2 more. Her previous cage mate had a tumour too and she was going to get surgery to remove it but unfortunately died from cardiac arrest right before. I want to put her down..I feel so guilty for letting it grow but i'm just scared and emotional. I looked at it about a few minutes ago and the main one looks sore and pink..like she's been picking at it. I keep crying i feel so guilty but i feel i'd look cruel taking her to the vets with now 3(?) tumours. She still eats, drinks and runs around but i feel horrible looking at her in that state. please give me advice.