Wild camels sometimes breed with domesticated or feral camels. Small birds and mammals can be food for stray, feral, and pet dogs and cats. Mammals as large as feral rabbits have been eaten. On land, little penguins are vulnerable to attack from domestic and feral dogs and cats. They are also killed by both feral and domestic cats and dogs. Abandoned animals often become feral or contribute to feral populations. Both wild and feral pigs are commonly hunted. Some are threatened due to the presence of feral cats. Although legally protected, they are still shot by people mistaking them for feral cats. As feral cats multiply quickly, it is difficult to control their populations. The lines between stray and feral cat are diffuse. The film cuts back to Tummler and Solomon, who are hunting feral cats. A limited population of feral pigs exists. More likely are problematic encounters with feral and domestic dogs. Chillingham cattle is sometimes regarded as a feral breed.