I gave my GSP a 8 way vaccine last night and today he has a fluid filled lump (size of a golf ball) on the backside of his neck. Is this a result of a reaction. What should I do? Will to go away on its own.
Sounds like a vaccine reaction. I would try to ice it a few times today. If there is not improvement have it checked by a vet. It could be an infection?? vetcare