My cat recently had a bilateral chain mastectomy following the diagnosis of an adenocarcinoma in one of the chains. She came through the surgery well and all looked good at her follow up appointment. However, over the next few weeks I started to notice her stomach swelling. I took her into my vet 3 weeks after getting her stitches removed to check it out. She did an x-ray and tested the fluid and determined it was a seroma. She drained the fluid and started her on antibiotics. The seroma has returned (from what I'm reading here that's not surprising) but it is firmer this time. Should I be concerned about that? Does anyone have recommendations on what to use for compression of the abdomen in a cat? I'm concerned the seroma will keep increasing in size. How do I determine how big is too big to just wait it out? Thanks!