I don't have much experience with bottle feeding, I'm delighted to say but this year for the first time in 26 years we have a rejected Hebridean lamb, one of twins. The ewe lambed outside and I think she got confused with other lambs running up to see their new flockmates. She was flipping the rejected lamb into the air and ramming her against things. being multihorned she has 2 large prongs on top of her head. We spent some time with them in a pen (in the polytunnel with the lockdown hens

) trying the usual tricks to get her to take the lamb but in the end we brought her indoors to bottle feed her. Although she had fed with our help from the ewe so had some real colostrum, we gave her the colostrum we had then onto milk replacer. At first I fed her 5 times a day, last feed at 2am (I'm a night owl), now at a week old she is onto 4 feeds.
We had set up a separate pen for her at the end of the ewe's pen and put her twin sister in with her for a play a couple of times a day. At first the ewe didn't want her even near the bars, but then we noticed that when we brought her in for the night the ewe was calling for her. So yesterday on day 6, in lovely sunshine we put them out in the FarFar Field which is a small area suitable for a couple of sheep. The lambs were so overexcited it was hilarious, bouncing, gambolling and charging round like Zippy the Hare

all with Rosetta the ewe chasing round after them. Today they are so well settled, Rosetta letting both lambs coorie in, but not as far as we know feeding Lark.
Penning the lamb near her mother and sister was an experiment as I was anxious about putting a lone lamb out with the flock on her own and so far it seems to be successful. Rosetta knows she has two lambs and is now proving to be a lovely first time mum
That's really the only experience of bottle feeding I have to share. Bent legs I have experienced before. We gave intensive physio trying to straighten them, as instructed by the vet, but sadly by the time that lamb was a couple of months old she still couldn't stand and her knees had worn through so sadly we had to euthanise her.
Ideally for your lamb, it needs a companion or you will be hounded forever, and as she gets bigger she will still think she is a cute tiny lamb and can come into the kitchen!