I never connected what happened to Boo to the microchip and we never ran any tests on the tumors the vet removed off of her (my choice, not his). I think we did her first surgery in May 2011 when he removed the tumor in her ear and the ones under her skin under her ear (3 of them,BB size), The one in her ear grew back in a few months and when I took her back for her recheck after that surgery, everything was fine, that was around the first of August (I think) but in about 3 weeks she had a really big growth under that ear. By the end of October, I knew it was time to let her go when the texture of it completely changed overnight and although we had her on antibiotics, I could see infection had set in. The growth was big, all the fur fell off, it began to open and drain and keeping her from scratcning it was not a easy job...even with a collar. I took as good a care of that open tumor as I could, made sure it was cleaned GOOD, several times a day and the vet was impressed with the ideas I came up with to keep it covered. She ate good, was jumping up on top of the fridge and acted totally normal but her quality of life was sad. I realize now that what she had was fibrosarcoma because it was very aggresive.

Funny but when I started reading this thread I did it out of interest... By the time I got to the last page, THAT'S when it hit me that this the kind of tumor Boo had and most likely the chip, the cause..