Offer an insulated doghouse stuffed with straw bedding and blanket. Or bring the stray indoors to a kennel or garage
Feed healthy, high protein foods to provide calories for generating essential body heat.
Use heated bowls to prevent freezing. Add warm water for drinking.
Get medical treatment for injuries, frostbite, starvation, dehydration. Vaccinations protect from disease.
Arrange Vet Care
Brush snow/mud from coat. Trim hair if matted. Avoid moisture against skin.
Limit time outdoors. Use dog boots and coat in frigid conditions. Watch for limping and pad injuries.
Contact local rescues and authorities to pick up stray dogs in need of help.