My 15.2hh 7 year old mare pulled her shoulder muscle last sunday, well i thought she was a bit "funny" before that so i just done light work with her and then on sunday she pulled up very lame so we called the vet after 3 days and he told us to keep her on three weeks box rest and massage in "White Ice cooling horse rub" to her shoulder everyday and every 3rd day of standing in take her a short walk. This was last sunday and she is getting better everyday the white ice is really helping, she is still lame but the three weeks is not up yet.  We are also gettign her Phisio up to her on March 6th, she gets the phisio up every 6 weeks anyway just becuase she enjoys it and it help her stay supple. :)

my mare severed a nerve in her shoulder, was on box rest for over a year, was nearly put down so many times but we had a fantastic vet, physio and accupunturist and she is now better than before the injury and back to doing dressage again, have the vet back and get a refferal to a good physio and just give her time, hoprfully it can work for you like it did for me! good luck