Sara,

I don't have either one of mine chipped, but that's because it's a relatively new procedure, and they only go outside with a leash on.

I think the least of your worries will be if Tinky will be mad at you. I have found that cats don't know how to hold a grudge. They might temporarily spurn you, but before you know it they will be back to normal.

Just a quick story to confirm this. Terry had more experience with dogs than he did with cats - until I moved in. He is a big softie at heart, and can't stand to see any animal in pain or confusion. So when it came time to take Tubby and Peanut to the Vet, lets just say that he was more stressed out than they were. He swore they would hate him forever for putting them through this. When we were finished, we dropped them off and went and ran a few more errands. When we got home, he was still upset about the whole thing, until Tubby came out meowing to greet us and Peanut started rubbing on the corner of the wall like she usually does when we first get home. They had completely forgotten the whole adventure already. That's when he figured out they wouldn't hate him forever. I just couldn't help but laugh about the whole thing.

And I'd have to agree with Carrie's comment that better a few seconds of discomfort than a lost cat, and the fright the poor thing would go through if it were ever lost. I think the younger the better, and I think Tinky would bounce back right away and be her old self in no time - and you'd be worry free.

If and when I ever get another cat, I will have it chipped at the first vet visit.