Not sure what to do. Our usually fit and active 13.9 year old male spaniel has been off his food last two days and become very quiet all of a sudden. He has a couple of unexplained lumps/mass. But I suspected it may be his teeth as they are rather black and smelly as he does suffer with plaque issues, but would it happen so quickly? He normally has dry food so made him some rice and chicken which he ate yesterday but turned his nose up at this morning. Vet said today it may be his teeth which would need an op but it is risky at his age. Vet also said one particular lump on his chest is a worry and makes op even more risky. He gave us a quote and details and said up to us to decide. I'm not sure what to do