Spock as a black panther

[dhae_knight_1]

Help, please!

I remember, ages ago, reading this story where Kirk and Spock were possibly kidnapped? At any rate, they were stuck on some alien world (possibly artificial?), with Spock transformed into a black cat. I don't remember if he actually was a black panther, or some alien creature that looked like a black panther, but I remember that he retained some of his faculties, although not all of them.

As far as I recall, Kirk and Spock traveled quite far to get... somewhere.

Does this ring a bell with anyone else?

I don't even remember enough about this fic to even try to tag this request. 

ETA: Found - in the comments.

Comments

[ratcreature]

It could be Children of the Sun by Gloria Fry? IIRC the animal is more a sort of giant sabertooth wolf-thing, but the plot otherwise fits.
http://www.arigol.plus.com/childind.htm

[dhae_knight_1]

Yes, yes, YES! That's it! Thank you so much, this has been driving me nuts. *sits down to read*

[hawkmoth.livejournal.com]

Geez, that sounds like a story I remember from a zine, like more than 30 years ago!