My 2 year old little man has a little lump on his hind leg that I just noticed last night. He's not limping or seeming to have any pain with palpation of it and is in all spirits. He's eating and drinking fine and we just took him on a walk and he was as happy as usual. You can't even see the lump when looking at him, you actually have to feel for it. Its feels moveable but it also does feel a little hard. Just wondering what this could be and if anyone had any experience with this. Of course the vet had no available appointments today and is closed tomorrow. Thinking what it could be...suggestions?