if your hamster has a lump on its chest that dozent get bigger it must be a assess if it dose then it could be a tumur. Check every week to make shur.
Yes, that is the top of your rib cage.
If it does not get better in a week or so then go to the doctor and have it checked out.
.. I have researched this because my dog has this too, it could be anything basically...if you can take him to the vets, it can be a fatty deposit or something more serious like cancer! I hope you...
because he is a lump