Take a deep breath and try to think postive. When you say "side," do you mean side of his neck? If he has an infections process going on, a cold or virus, his lymph glands may be swollen. And the lump could very well be a fatty tumor or cyst. I'm thinking of you and Milo and holding you in my prayers. Keep us updated and kisses to Milo. BIG {{{HUGS}}} Sandra