My 12-year-old boy, CC had his surgery in May and had been doing really well until about a month ago when he started what I thought was phantom pain but seems to really be hyperesthesia.  I've been dabbling with his meds to dial in on how to make him more comfortable. I am just saying this so you can be aware that sometimes there can be other things that come up after surgery.  When I made the same decision to amputate his leg due to osteosarcoma, I really thought that I only had to worry about his cancer coming back. So I just recommend keeping in mind any changes in his behaviors. 

On a side note, I made lots of changes to my house.  Not only did I cut down all the cat doors and the opening of his cat box, but I also built what I call floating steps mounted to the wall with carpet so he can get to any window he wants.  I also made sure my furniture which he likes to jump on was all placed close to one another and provided a step to the bed once he started feeling better after surgery.  And recently I made several raised feeding and watering bowls.  Many have stated, and I confirmed with a PT, that the raised bowls can assist with their balance.  Also, if you don't already give him health supplements, I would recommend looking into it.  I have read and heard many tripawds can develop arthritis and supplements can help with that but overall health as well.   I don't know if Jackson is still really playful or not, if so you will just have to try different techniques to see what works for him.  CC still loves to chase a ball on a string but sometimes we just have to play while he lies on his side.

My boy also gets tired after a few hops and will just sit down for a bit, so very normal.  But then sometimes he gets really playful and bolts around the house!  But I have to say, I still baby him as much as he will let me!!

I hope some of this is of some use to you.  I wish I would have found this site months ago!!  It's been a blessing!