Yes, scabies-like mites exist in many animals (dogs, cats, livestock, wildlife).

In animals it’s often called mange, caused by related but host-specific mites.

Animal mites can irritate human skin but usually don’t set up a full scabies infestation in people.

No, scabies is not an insect problem and is not spread by insects like bedbugs or fleas.

Life cycle of human scabies:

Egg → larva → nymph → adult, about 10–14 days total from egg to adult.

The female lives weeks in the skin, laying eggs in burrows.

Off the body, mites survive a couple of days at most.