I have an almost 9 year old lab. About 2-3 weeks ago I noticed a small knot(size of a quarter) on her neck. On Saturday it had grown to be like a golf ball sized soft knot. Between Saturday and today it got to be like a baseball sized known. Went to the vet today they drained it and sent it off for a sample. Basically said it was a fluid filled infected sac. He sent off a sample to determine what type of infection it is. Anybody every seen anything like this? Or thoughts on what could have caused it? Will try to post a couple of pics. First pic is Saturday second is last night
