I have 3 cats with midrochips (the oldest is 14 and we didn't put one in
her because takeing her to the vet is stressful on her poor health), 3
iguanas with microchips, and a dog with microchips.  My ferrets do not.
Why?  Because I plan on adopting 4 more and them having a batch done on
them.  It is so much cheaper that way!
 
Gail
[Posted in FML issue 3623]