Glad to hear that Oscar is okay. It is worrying when they start to limp.
You may or may not know that Piper has hip dysplasia and I take her swimming 3 times a week to a place near to Leyland. There are several hydrotherapy places in our area, however, I chose this one in preference to others due to the fact that rather than swimming against a current, she actually gets to have fun by retrieving lots of toys - she LOVES it
If you want details on the place then just PM me and I'll give you the number.
Good luck.
Louise