UPDATE! so, once back from vet, I'm between jobs and so just watch her nonstop with her cagemate, Babybear. She IS a rescue so that vist, was tramatic, but my vet sedates them for all testing..you just knew she knew WHAAAAA? once we got home. ok, she is fine.now, .she is eating , drinking fine...i touch the hard lump, small, like tiny marble..I move it...no reaction...I am not so sure this is an abscess, she HAS NO PAIN. exotic vet and I agreed to watch, and wait. i will weigh her daily, i will feel it daily for change and I pray to GOD this will remain NO CHANGE and maybe the lil girl will die with it , i hope. Next, I am a registered sonographer, so I will be doing a scan IF it will work without shaving her neck...we will see. I have her back happy, she can be so flipped out so easily so that will be a plan for next week. If anyone knows of benign small mass under chin, id love to hear about it! To put her under surgery will be so tramatic , i just want that my last resort.