What animals eat chickens and birds?

Birds should never be left unsupervised outside of the cage, especially if other animals, including other birds, share the same house. Even if a pet dog or cat has acted completely trustworthy around a pet bird, it should not be trusted. Many birds have died as a result of another housepet either "playing" too exuberantly with a bird, or from the pet biting or stepping on the pet bird. Birds may also injure each other. Lovebirds are notorious for nipping the toes of birds housed in neighboring cages. Toes are the most commonly injured body part, and bleeding may be serious, and even fatal. Especially with the onset of puberty, birds that previously got along together, may begin fighting, with fatal results.

Any animal bite should be considered extremely serious, possibly life-threatening. The bacteria found in the saliva and the mouth of a mammal can cause fatal septicemia (infection in the bloodstream) of a bird in very short order. Cat bites should be considered the most dangerous, as the Pasteurella bacteria commonly found in the feline mouth, are extremely hazardous to birds. Even a simple puncture by a tooth can result in a fatal infection. Scratches from claws are also extremely dangerous, as the risk of infection is very real.