Can anyone help, Mac has developed a sort of rash just on one side of his shoulders. It looks like heat lumps but they've been there for 2 weeks now. They are only in one place and I haven't a clue what's caused them. RI said doesn't look like anything to particularly worry about and they don't bother him at all, you can groom over them and he just stands there. Just wondered if anyone had any ideas of what they may be? Thanks