If wildlife appears thin, weak, or injured, it should be rescued and delivered to a wildlife rehabilitator.
If a bird or mammal has been attacked by a cat or a dog, presume that it is injured, even if no injury is obvious. Pet attacks usually cause significant internal damage. Traumatic injuries are obvious; e.g., hit by a vehicle, cuts, wounds, bleeding, severe limping, wing damage, etc. Other examples of sickness or injury include wildlife that is lethargic, staggering, shivering, drooling, slow to move away from perceived threats, and feathers or coats of fur that appear rough or with scabs or rash.