I'm not very happy because my full pedigree champion cat (himalayan persian x half birman half selkirk rex) which cost me $600 gave birth to a kitten (looks like a full domestic to me!) please tell me if it will stay like that or it will change as it will grow!

It can't be half Himalayan Persian, half Birman and half Selkirk, it has to be half of one and a 1/4 of the other two.

What did you mate it with?

Pedigree cats, are usually sold de-sexed, vaccinated and usually around 3-4 months old, if you plan to breed form it, and you need to be registered and know exactly who your mating you cat with, especially if you plan to sale the kittens as pedigrees. I know this as a friend is a pedigree cat breeder. pets question and answers,www.5d2d.com

If you mated it with another breeders stud cat, then it will most likely change as it grows, depending on what breed it was mated too.

If you don't know what it was mated with then a stray cat has most likely got to your cat.

Friend is a Burmese and Australian mist cat breeder

If it walks like a duck and looks like a duck its probably a duck

Be responsible and spay your pet!!!