my daughters 4h wether has a lump where we gave the shot a couple weeks ago. Its hard and about the size of a quarter. He goes to fair in about 2 weeks and we have to clip him next week so it will be very noticable. Is there a way to get rid of the lump?? This was the only time he got a lump from the shot. I give it behind the right front leg where the vet showed me to give it. Any advice would be appreciated. Thanks!