mango is a orange fancy mouse. she’s a little over a year old, i got her last may. i went away on vacation for 5 days and my neighbor was taking care of all of our pets. i held my mice before i left and didn’t notice anything weird, but when i came back i looked in the cage and saw a huge lump on mango. i’ve been looking online and stuff and i don’t know if it’s a tumor or an abscess. the lump is kinda squishy, and it isn’t colored any different, it’s just under her fur i guess. she’s acting no different, she was running on her wheel and snuggling with her sister so i don’t think she’s in pain but i want to know what it is so i can get her fixed up.