Ahoy Everyone, I'm glad to find this community! I wanted to share our story, get some advice, reassurance, tips, etc. etc. 

My one-eyed Jack cat has been diagnosed with a bone tumor in his upper right humerus. I'm gonna say I first noticed a limp about six weeks ago. First vet visit with xrays was a week or so after that, then second visit with xrays about two weeks following. Now here we are two days from surgery to amputate. We don't know the nature of the tumor. From reading his xrays, one university veterinarian suspects Jack may have osteoporosis (very rare in cats), so we were reluctant to do a biopsy. We'll do pathology after the surgery. Another university colleague disagrees with the first. But everyone agrees about his tumor. 

Despite Jack's obvious discomfort the past few weeks, he's been a pretty normal cat, although he's been sleeping more and his mobility has been limited due to the pain in his leg. For example, no jumping from the floor to the banister for his high-wire walks, but he will still jump from floor to bed, which is a few inches lower. He barely puts weight on his leg, and if sitting will extend it in front of him rather than curl it up under him. He's had some pretty good drugs to take when he will take them! I have an opioid that has been compounded. Rather than play wrestlemania with my cat to squirt into his mouth, I figured out that pill pockets hold exactly 1ml of liquid each and he will usually eat two of them without a lot of fuss. I don't keep him continually drugged; I let him tell me when he needs it. 

Trying to prepare mentally for the surgery. I figure that since Jack's been doing without the leg for about 4 weeks, it won't be as much a shock to his system to have it removed as much as it would be for a critter who has his leg traumatically removed after an accident, for example. He does still use it to balance slightly, but he's barely putting any weight on it now and it's just in the way. I did find the information about using baby onsies, so I got some today and will try to modify for his post-surgery needs. That sounds like a great idea, definitely better than a cone!! 

When Jack's leg first started acting up, we had to isolate him to keep him off furniture / keep him quiet because we thought it could be a pulled/sprained muscle. So we put our pop-up tent in the living room with blankets, pillows, cat bed, litterbox, food, etc. That's where I plan to keep him for the first few days after surgery. It is a great idea, but he is not a happy camper. (ha get it?) 

So the biggest complication of this whole thing is that Jack is a half-blind, one-eyed cat, not that he realizes it. Jack's backstory >> Jack was a stray born with a herpes infection and badly affected eyes. His momma kitty brought him and his littermates to me on my birthday 12 years ago. One of his siblings was completely blind / useless eyes. That kitten was so afraid that he ran off. We found one of Jack's siblings a home. And we began treating Jack and of course we "got stuck" with him. The momma cat never would let us touch her, but she would stay on our outside stair landing and watch us take care of the kittens and would let us feed her. After about a week she was satisfied with our care and we never saw her again! << Jack had one kinda ok eye, one bad eye. We treated them both. At close to a year old, Jack had his bad eye removed, and the legend of the pirate cat was born. However, he is still half-blind in his good eye due to corneal scarring. It's almost like he has a piece of tissue paper over his eye. The eye behind the cornea is good, it's just the cornea has different thicknesses of scars all over it that he has to see around. 

His good eye is on the side of his good leg; his blind side is the side they are removing the leg. So I don't know how this complicates things more but we will work through it. 

Anyway, thanks for reading and I look forward to learning from everyone and leaning on you for support as we go through this journey with little Jack. He's such a good little buddy. Really a great cat. He's been through so much. For an indoor cat, he's checking off those 9 lives pretty fast.