Hi Julie, I would think she needs some kind of anti-inflammatory such as Metacam and you can use a bag of frozen peas to cold compress her shoulder muscle. Just apply for a few minutes at a time then repeat a couple of times. Rest her and keep her on leash for toilet breaks and short walks. Give her a few days to heal and if there is no obvious improvement and she can't easily walk off any stiffness then seek the advice of an orthopedic specialist. On the rare occasion we've had such an injury here I follow this course, a specialist will be able to pinpoint the actual injury and decide whether or not surgery is necessary. (If she is in acute pain and crying then visit the specialist earlier). Having had a few good tumbles off horses in years gone by there is nothing like a bone bruise for pain!
All the best Rose
