I have a 10 week old Chihuahua that got her second round of first shots last week. I just noticed that she has a rather large lump on her neck at the site of the injections. Did the shots cause this and do I need to worry??
Sometimes a vaccination can cause a localized reaction such as the one you are seeing. It is not unusual. I would have it checked by your vet to be on the safe side. vetcare