Hi, one of my little Pekins had a similar problem. I threw everything I had at her. I put warm water and epsom salt in a cup and plopped her in there twice a day to soak with a hand towel around her body to capture the heat and keep her from drinking it. Helps if they are a good fit in the cup so their hip is covered but not alot of room for movement. About 5 - 10 min. It must have felt good because she was really good through it all. I also gave her hydrotherapy in the sink twice a day too and she did move the leg so I was confident it was not broken but possibly a severe sprain. She held her foot up and the toes were not spread out. Definitely the brewers yeast but they had been on that from day one.
I would also gently massage arnica gel (I think the brand is T-Relief) and stretch her leg very very gently, not full extensions just until there was slight resistance. I think it all made a difference but the hydrotherapy at a minimum really helped. I would also spread her foot out so the webbin was flat and not curled up. She improved. She does have a permanant limp but moves along just fine, swims, keeps up with the group and seems happy. Good luck. You feel so helpless when they are so small. I could never really detct I think her injury was in the hip area, tough to see any swelling through the feathers but there was some inflammation I could see when she was wet. No idea what happened.