About four hours ago I foud a huge hard mass between my dobermans shoulder blades right in the middle. As it is 10pm I have to wait until tomorrow to go the vet but wondered if anyone has had any experience with this. Yesterday I took him to the vet for acne underneath his chin and also because he was shaking his head as if his ears were bothering him. He got his ears flushed due to wax buildup and was put on Simplicef for the infection on his chin. He also had blood drawn to check on something. There was no visible lump at that point. This evening I felt the lump and saw it - it is the size of a golf ball and extremely visible. It moves, but is a hard mass. It almost feels like a fatty deposit, but he is only 10 months old - and it came suddenly and quickly. Does anyone have any thoughts on this or can anyone ease my mind before the morning? He is not in any pain nor does he seem to have any discomfort when I touch the area or put pressure on it.