It does look quite an enlarged and swollen area under the spot. It's possible it could be a tumour or an abscess. It would be an idea to have a vet check as if it's an abscess she could need antibiotics or it could lead to blood poisoning. If it's a tumour then she may need pain relief meds. She may need pain relief meds anyway as they can have all kinds of pains in old age - toothache, arthritis etc. Is she eating and drinking ok and active in herself?
I had one that developed a lump, and at this age, with that size lump, they aren't going to do surgery if it is some kind of tumour, which is quite common when they get older. But they usually do start giving them metacam/loxicom as pain relief, because as Rainbow says they do hide pain very well. Does it feel hot at all like an abscess?
I'm sure they'll help. Her cage is a bit on the small side though. Although robos are small they are very active and still need a lot of space. I bet she likes that coconut hut though
The recommended cage sizes now are 100cm x 50cm. It used to be 80cm x 50cm and anything smaller than 80cm x 50cm really is too small unfortunately. You can often get second hand hamster heavens very cheap (80 x 50) which would be an improvement. Some people use the large Zoozones as well (which is a similar tank style perspex cage) but the lid needs meshing on those.I’m surprised to hear you say upright one is better as I’ve always read online watched videos and also my own experience is that the flying saucer ones are often more recommended.This is a separate thing but I was just checking, does Ash have an upright wheel? I know pet shops will tell us a flying saucer can be used instead of a wheel but an upright wheel is best.
