We have 2 one year old cats this morning i woke up to find a kitten asleep with them in our conservatory then just now another cat was teying to get in our back door they are all black and white..
i would say not, especially when it comes to mating they have no rules!
our mum cat treated all dcats the same from what i could see, with the exception of outsiders i mean, all 'insiders' whether related or not, same treatment, disdain, obvs.
Only an anecdote, but - my mum and sister adopted three kittens from the same litter, my mum having two and my sister one. A couple of weeks later, taking them for vaccinations, my mum tried to put my sister's kitten in the same basket as her two - but this proved impossible as they hissed and scratched and seemed entirely to have forgotten they were siblings.
have very similar anecdotal evidence Asmoto - two kittens returned to us from our litter whilst 'parents' had weekend away, they couldn't leave them you'd have thought they'd been dropped on an alien planet with complete aliens!
