In the wild, Canines are predatory and may see chickens as potential food. When domesticated, they may still carry these instincts. Foxes and Coyotes are notorious for killing chickens on farms. When foxes get to chickens they may go into a frenzied state and kill 30 chickens which to some could mean the entire flock. Young foxes may die when trying to hunt chickens as they are inexperienced and despite popular belief, chickens are not defenseless. Coyote attacks on chickens can be much rarer as Coyotes are generally limited to North America and are generally weaker than many other canines. Domesticated dogs must be properly trained in order to interact with chickens without sacrificing a chicken or maybe the dog. Dogs can still carry ancestral instincts and this includes seeing small birds as food. If properly trained, they will not attack chickens. If a bitch (female dog. Not using this word in the modern context but rather the ORIGINAL context) has recently given birth or lactated, she may adopt chicks as her own. Mammals naturally do this and orphaned chicks might see her as their mother.
