Most problems ferals encounter are with people. They tend to live near people because they need to scavenge to survive. Hunting birds is an inefficient use of their precious energy since healthy birds tend to simply fly away. As well as eating food that we discard, they eat insects and small rodents. There is misinformation about their tendency to eat birds.
Feral cats use the minimum energy to obtain food.
They are excellent mouse hunters, but hunting birds is an inefficient use of their precious energy since healthy birds tend to simply fly away. While house cats who are allowed outdoors do, indeed, tend to hunt birds, ferals eat leftovers and catch small ground mammals and insects. Many people think that ferals are a nuisance and a danger to their pets and should therefore be eliminated. Ferals do get into garbage occasionally. People also complain that they make noise when mating and fighting, and have endless kittens.