Hard Lump On the Outside of Upper Back Leg
I noticed a visible hard lump on the outside of my Boston's back leg. The Lump is one the upper part of the leg where his muscle is, and is larger than a quarter. He is not limping and does not seem to mind me touching it. Should I just let it be, or could it be a sign of something serious? Has anyone else ever noticed this on their dog? Thanks for any info you can provide.