Mix breed cats tend to be healthier than purebreed cats, less inbreeding.



It depends a lot on the cat. If the kitten/cat is from a colony of ferals or
cats in the same area, there could be considerable inbreeding.
Also, a purebreed cat, one that's bred correctly, won't be inbred. Momma would
have excellent prenatal care and the kitten would have a healthy start in life
with all the right food, vet care, etc.
My mixed breed cats, indoor only, have lived to be 10 or 11 before falling
victim to cancer or other problems.
My purebred Balinese died three months before her 20th birthday. Her kidneys
simply gave out and it wouldn't have been a kindness to keep her going. She got
the same care, food, etc. as the mixed breeds that she was raised with that
lived half as long.



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