What are the signs of frostbite in dogs?

The ear tips, tail, paws, and in male dogs the scrotum are the classic frostbite sites, since these areas have less fur coverage, less fat insulation, and blood vessels that constrict early during extreme cold to protect the body's core, which paradoxically leaves the extremities more exposed. A dog left outside too long in freezing wind, or one that gets wet in below-freezing conditions, faces the highest risk to these areas.

During the cold exposure itself, affected skin often looks pale, gray, or slightly blue and feels distinctly cold and unusually firm compared to surrounding tissue, sometimes described as feeling almost hard or waxy. A dog may also show pain or sensitivity when the area is touched, though some frostbitten areas feel numb initially due to reduced nerve sensation from the cold.

Once brought into warmth, previously frostbitten skin often becomes red, swollen, and increasingly painful as blood flow returns, sometimes developing blisters or a darkened, dying appearance over the following days if damage was severe. This delayed appearance is part of why frostbite is often more serious than it first looks immediately after coming indoors.

Move the dog to a warm space and gently, gradually warm the affected area with warm, not hot, towels or lukewarm water rather than direct heat sources like a hairdryer or heating pad, which can burn already damaged tissue that has reduced sensation. Avoid rubbing the area, which can cause further tissue damage, and arrange veterinary care promptly rather than waiting to see how it develops.