The graduate student has a female cat. Went outside to play and got pregnant. Came back and gave birth to a litter of cats.
A few kittens were given away, leaving a male cat to continue raising.
Nine months later, the son grew up, mated with his mother, and the mother became pregnant again.
The two cats are inseparable all day long, the son follows behind the mother's buttocks, and the mother is very fierce to the son, biting hard from time to time. The son screamed and dodged, but did not dare to fight back. But the son is also short-tempered, scratching and biting if people come close. The junior brother said that the cat was perverted.
Later, the cat's son disappeared, and according to the younger brother, he was driven away by the cat mother, and maybe the cat mother was also very entangled in her heart.
The new litter of kittens is healthy. The junior brother gave away all the kittens this time, and left no one. The mother cat is also on birth control to prevent future troubles.
Cats have no human nature, and all people are incestful, let alone cats.
As far as I can see, inbred cats don't want to be as people think, missing arms, multiple heads, and strange shapes.
If the male and female cats are strong, they can generally be born safely, but the number of births is small.
Generally, robust male and female cats, who can give birth to and raise, will give birth to 4 to 6 kittens, and inbreeding, may give birth to 2, or even 1 is very common, inbreeding, the survival rate is indeed far lower than that of normal marriage cats.
Some cats are born with diseases, such as severe heart disease, pneumonia, and hydrops, which are visible, invisible diseases.
There are also those that will be passed on to the next generation, then I don't know.
As for recent breeding, there will also be the kind of purebred cat that looks better than its parents, with a larger stature, a better personality, and more stability.
But normally, it is necessary to put an end to inbreeding and give birth to sick cats, and these cats continue to breed and breed the disease. There is no need to go inbreeding.