Looks cute. Only thing is, we have a creatu with bat-like wings already. And also, I think there should be a more dramatic change from form to form. They all look basically the same. I know they're the same species, but usually Res pets vary a bit more by age.
I support this, although atquati does need pets more.
I wouldn't say the aging concept is too bad about changing. Not all of the pets change a lot between stages. The berrok is pretty similar in all stages, in my opinion.
I love it. Although, it does look a bit to...much. Try taking the back spikes and head horns away and maybe some different ears. But still, so cute. And maybe this one won't be a CS pet -.-
"An Insane is a small creature that zips from person to person at hyper speed, stealing wallets and hearts in equal measure..." -Dmann