Try using 100% Organic extra virgin coconut oil as a topica for cuts, abraisions, and skin irritations. In it raw form, it has not been heated and therefore retains the anti-oxidant, anti-fungal, and antibacterial properties. It forms a chemical bond over the wounded area and helps the skin heal quicker. It is also a great external hoof, coat, mane and tail conditioner that absorbs into the hairs and hooves insteat of just coating them moisturizing them. It doesn't need to be rinsed off. It has extremely beneficial properties when mixed with feed at 1 to 2oz per feeding. Google coconut oil healing properties online. You will see alot for humans and some for horses, but it all applies. We get excellent results using it bothe internally and externally. I agree the vet should still see him to verify the soundness of the leg, but it sounds more like a bruised muscle. I Hope this helps!