Elizabeth Elkton, Maryland 1/1/2015 8:49:09 AM Hello,I have a 3 month old Red Coonhound/Penn Marydell Foxhound and he's got a lump on his right shoulder. Last night it was the size of a frozen pea and today I can see it about the size of a quarter. Its squishy and moves. Should I worry? He goes to the vet in 2 weeks. Should I get him in sooner? Thanks for any advice.