Good luck to your baby!!!
My own personal experience is with my Rogan. 14lbs, purchased from a BYB
Rogan was our very 1st Yorkie purchased. I'm glad I was able to take him out of that enviroment!
He had LP in both knees and we had BOTH done at the same time. TWICE.
The 1st surgery the groove in the bone was not grinded down enough so a 2nd surgery was needed
After the 2nd surgery, the 1st night Rogan pulled out ALL his stitches in his one leg - it was horendous for me and I couldn't handle it. (I went to the floor and almost passed out
Hubby had to take over for me) His poor leg was WIDE open as it was a LONG incission. It was a very trying time, but everything has worked out great and he's good now
My boy walks alittle funny but other than that you'd never know.
I wish you luck and I hope everything goes well with the surgery!!!