I've never heard of a microchip causing that kind of behavior. I'd be more suspicious that it might have been brought on by the anesthesia-- there are a few drugs commonly used in anesthesia protocols that can very rarely cause quirky behavior changes.
An ear infection would be even more likely though.
__________________
Penny: Bane of Moles! Terror Among Terriers! Really Gosh Darn Cute!
Penny @ Dogster: http://www.dogster.com/dogs/583831 |