I have an 11wk old kitten I've had since birth. She has 4 other siblings. 'Gremie' was born with persian characteristics, flat face and big eyes. Gremie, she looks like a gremlin, was the runt of the litter. I've searched everywhere and find that some believe there is a feline version of down's syndrome and some think not. I'd like to know if there is. I think this is what 'Gremie' has. The most loving of the 5, she is very playful, runs into EVERYTHING, can't hold her balance, when sitting still she is constantly swaying.
Please let me know, Thanks

This has already been discussed on this site: https://www.askmehelpdesk.com/zoology/feline-equivalent-downs-syndrome-101074.html

Hopefully that will provide some helpful information.

Here are a few other links I ran across:
Taking Care Of A Cat Diagnosed With Down Syndrome | Itchmo: News For Dogs & Cats (http://www.itchmo.com/taking-care-of-a-cat-diagnosed-with-down-syndrome-1523)
kitten with Down's syndrome? - Ask a Vet (Pet Health) - MedHelp (http://www.medhelp.org/posts/show/447186)