I used a Ruffwear Cloud Chaser jacket and sewed up the arm hole. It worked like a charm - the jacket goes up to the neck and the material on the inside is similar to fleece- it never got stuck to the incision. And because we sewed up the bottom of the arm hole, the jacket didn't touch the incision. 

What size is Tipper? And is he a front amp? 

Hi Tipper & family!

Shirt fit is tough on this kind of pup. I know, my Izzy is an Am Bully mix of about 55 lbs (less now), so has a deep but narrow chest and a tiny waist. I found that the all cotton (old school) size small boys shirt I found in my child's closet has been the best fit for her. That said, I've had a lot of success using hair elastics to narrow the head opening as well as keep the waist close to her body. You might also try stitching the head opening or putting snaps on. Now that I think of it, a big onesie would be perfect but I think Tipper is just too darn big.

My first day back to work, I was so worried she'd scratch or lick that I took a large abdominal pad (giant, thick pad) and placed it over the incision, then used stretchy adhesive tape wound all the way around her. You could also use an ace bandage, but either way, have to be careful not to wind it tight. Then I put the shirt over that.

Izzy does manage to wriggle out of the shirts and I've found that thicker, less soft shirts are better. They stretch less and while still not perfect, have done well for me. If you have a Walmart nearby, they just put doggy sweaters out that have SLITS instead of sleeves. YES! I got one and will sew up the arm slit I don't need. They are nice and snug (if you get the right size ... I'd guess Tipper will be an XL). You could also try a shirt under a harness ... no moving that bad boy!

Hope you find a good fit! I put some photos of Izzy's configurations. These are all from her 1st week post op.

        Boy's Circo size small                     Harness (1 buckle undone)          Hair ties to the rescue! (x2)