My Baby Bear just had her front leg amputated on 7/30.  I left her in my master bathroom for 2 weeks.  She wouldnt eat or drink after a few days so I gave her homemade chicken bone broth (no added salt or flavors) and unflavored pedialyte (50/50 ratio more or less).  She got dehydrated and I gave her the mixture w/ a 1cc oral syringe (side of mouth) all day until she was going to the bathroom again.  We had a really rough 2-3 weeks.  Had the same issue w/ the litter box and peed her bedding over and over again.  I threw her bed away and just gave her towels that I could wash daily until she stopped doing it.  (I finally starting taking her to the main litter box and not let her run out until she went.  Then she started hiding in there...ugg...then scared of it again.  I didnt put the cone on her because she wouldnt eat and it was awkward enough for her to figure out how to get around. I figured out after a little while to put yoga mats on the floor for traction for her and to soften her blow when she falls.   When she came home from getting all of her stitches out she was really happy and was rubbing until I put the onesie back on her (cut the arm hole so it would fit her better) and she became depressed again.  (Let Code enjoy his moments of victory, it means a lot to them.)

I didnt opt for radiation or chemo, (I wont do it for myself and I wont put my baby though that), I went with a homeopathic Traditional Chinese Medicine, (TCM), called Stasis Breaker.  Its a prescription and you can only get it from a TCM Vet.  Fortunately I found one in my small town 11 miles away!  I started The Bear on 'Stasis Breaker' a couple weeks ago, (my vet said shes a perfect candidate for it since she had the soft tissue sarcoma.) 

I have a medical background, (I was a surgical nurse), ask what the clearance was on the margins and where the clearance was the least.  Have the doc point out where on Code's incision.  This way you can keep an eye on it for any type of growths and act on it right away, dont let them talk you into 'just monitoring it to see what it does or if its just a cyst etc'.  This way you will feel like you have more control monitoring it vs not knowing where to really focus.  I would really look into the stasis breaker if I were you.  Cancer cells are pretty much normal cells that cant/wont die off.  All cells in our bodies are suppose to have a normal life cycle and die off.  When they dont die is when they can create havoc and become cancer.  The Stasis Breaker helps regulate the cells so they will die off on a normal life cycle and not metastasize.   BTW the first vet I went to (her prior vet), gave her a death sentence of 5 days, maybe a month but doubtful w/ the rate the tumor was growing.  The TCM Vet that I took her to 4 days later said they could save her life, rushed her back within 2 hours of us showing up for our office visit and amputated her leg, (mind you we ONLY had an apt for an office visit to get the stasis breaker). 

We started doing treats to get her to move more and jump on the shortened sofas. (I took the legs off the sofas so she couldnt climb under them to hide.)  It worked until I started putting the pills in her mouth, now shes scared of the treats.  (one step forward 2 steps back).  Word of advice dont mix pills w/ food if they dont want to eat already, it just makes them not want to eat even more. 

I have been trying to build her confidence by supporting her chest (they took her complete front right leg, shoulder and shoulder blade) so she can kinda feel normal.  She slinks around when shes not sleeping or trying to hide.  I would put her in the litter box a couple times a day until she would go. 

I started taking her out to the lanai about a week or so ago.  She is terrified of everything now so baby steps in introducing her to the world.  She is just starting to re-engage herself and today she chased a lizard!   Since she hasnt really done much other than sleeping and tired easily.  Its a slow process...my Baby is 12 yrs old, (thought she was only 10 at time of surgery until I pulled her docs), and isnt too excited about too much right now.

I have an open floor plan and put double baby gates up in my kitchen (about 5' high)  to close her and Puddy-Cat in that area (kitchen, family room, hallway and their bathroom).  Bring Code back home...it will do both of you good to be home.  Its a crazy roller for the first month, (I was physically and emotionally drained and feel like I aged 20 years during those first 2-3 weeks), a little bit of normalcy helps out a lot.  If you need anything everyone in this group is amazing especially Kerren!  She is always there for you.  Its like when you are almost at the end of your rope shes there to pull you back in.  Oh yeah that Royal Canin (or however its spelled) food does work wonders to get them to eat!  Good luck, I know you guys will be fine.