I FOUND A LUMP ABOUT PEA SIZE ON MY DOGS CHEST JUST UNDER THE SKIN.AS I WAS ROLLING IT ROUND N FEELING IF IT WAS HARD IT HAS JUST BURST.SHE DIDNT EVEN BAT AN EYELID.WHAT THE HECK DO YOU SUPPOSE IT WAS? HAS ANYONE ELSE HAD THIS HAPPEN? IT HAS COMPLETLEY GONE

A FATTY LUMP OR SOMETHING? ANY IDEAS??? X