Because they can't find enough food and don't have a good living environment
Because they are born with bad health
Because moms don't take good care of their babies
Nowadays, people talk about two kinds of feral cats: stray cats who rummage through the garbage in the city and don't have a fixed place to live, and spotted cats who live in the wild and have never lived with humans. ***The other is the spotted cat that lives in the wild and has never lived with humans. Stray cats are basically abandoned domestic cats and their offspring.
These cats do not have a fixed residence, just like homeless people without a home, a corner or a garbage bin may be their humble nest. There is obviously a big difference between stray cats and real domestic cats. In terms of physical condition, they will become malnourished because they cannot find enough food, and they may even be sick all the time because of the poor living environment, so the stray cats that people usually see are very thin and weak. In terms of personality, stray cats are more complex and worldly than domestic cats.
They will often make threatening noises to humans who approach them, but when they realize there is no danger, they will be very close to strange passers-by. Many domestic cats are proud, individualistic, and repulsed by strangers, while stray cats will try very hard to please strangers, like dogs, because they want to be sheltered by humans.
Another wild cat is the spotted cat, the hunter of the jungle. They are wild cats that have not been domesticated by humans and have always lived in nature, with athletic stances, sharp claws and teeth that can easily shred their prey.
Spotted cats' hunting genes have evolved to be more advanced, and they live happily in nature with their excellent hunting ability. Spotted cats have never been domesticated by humans, so they are very aggressive. If you see these rare spotted cats in the wild, you can't treat them as gentle cats, they are very dangerous.