My rat, Iris, doesn't usually clean her tail and while I was cleaning it yesterday I noticed that her tail was squishy. It didn't seem any bigger than normal or warm so I don't think its inflamed but I haven't had luck figuring out what it could be. Its always been a little squishier than my hairless rats tail but Iris weighs 100g more than her so I figured it was just fat. I don't have a scale of my own and borrow a friends so I don't know if she has gained any more weight recently. She doesn't mind when I touch it. Does anyone know if this is normal? Do rats gain fat on their tails? Any information or advice is appreciated.