Pet Naming

[Saphos]

Alright, this question is slightly less noob-ish than my other ones. :o) I tried asking in-game and nobody knew the answer:

I had two monkey pets, and I had them mate and make a new one. It already likes me 100%. I want to name it, but whenever I try it just changes the names of one of my old pets. So how do you select which pet you want to name?

As usual, thanks in advance to anyone who knows the answer...