So sorry to hear that poor Finn's not well. I hope the medication helps him to feel more comfortable. You have quite a lot to cope with just now, with the combination of an older dog and a new puppy.
Thinking of you and sending andxxx.
Oh poor Finn and even harder for you. You are handling it so well with the vet and as @SwampDonkey says you are doing all you can. Hopefully the medication can do its work and give Finn another chance to spend more good time with you. How are you doing yourself?
Finn is still limping and in pain. But he walks!! We walked him a little and he had his poo and pee. Then back home to rest. He will get some extra gabapentine from us and we hope he will slowly continue to go upwards...lambies and fingers crossed!