Thank you! Osteosarcoma in his front leg. I sent pictures to the vet but unfortunately they are having internet issues and said they would look at everything as soon as they can but they don't know when the internet will be working again. He also has swelling in his remaining front leg and just seems more lethargic so I wanted them to be made aware of everything. I'm trying not to be overly paranoid but I know after a major surgery that things can happen. He has been more lethargic yesterday and today but two of his favorite people (my Mom and Dad) flew back home yesterday after visiting for the holidays and he usually gets a little sad when they leave. He's still been eating and drinking and using the bathroom regularly and he's been on antibiotics since he came home at 3 hours post-op so I'm hoping that we can get this figured out. I will definitely check back in once I hear from the vet.

The vet finally contacted me back this evening. They are convinced the bruising is self inflicted and advised that I use a cold compress on the area (which I started doing a few days ago). He still seems to be his happy self and even tries to get us to play fetch and tug of war (and then gets a major attitude when we tell him no, not yet 🤣). Trying to transition him to a weight management food since his appetite is back in full swing so we can reduce pressure on his joints. Vet would like him to drop 15lbs. Once he is healed up and staples are out that will be our next goal. Thank you everyone for your advice and well wishes!

LOL he actually fell fast asleep in my lap after I placed the compress on. I think it had been irritating him and the coolness was comfortable. He's 85lbs right now and the vet thinks 70lbs would be ideal. Thank you for the tip about frozen green beans. We have a lot of them in the freezer so I will see if he likes them!