Has anyone had this happen? It's not a lump that has been growing over time, it just appeared. It's a hard lump under his left ear, right along the neck. I'm going to take him to the vet this week but I am afraid it is going to be something serious that I can't afford to fix. He is my baby, I have had him for 13 years, he has been through the ups and downs in my life and I don't want to lose him. Any suggestions as to what could be wrong?