The belly is the lowest point on a dog's body and the first to absorb rain, puddle splash, and wet grass contact. Prolonged dampness creates a warm, humid environment against the skin — ideal conditions for bacterial and fungal growth. Short-legged breeds like Corgis, Shiba Inus, and Dachshunds face this more than most, because their bellies skim the ground with every step. PETT2GO's four-leg raincoat design covers the underside directly, reducing wet contact time and post-walk cleanup significantly.

This is the risk most owners don't anticipate. When rain ends and wind picks up, a dog's damp coat becomes a heat-loss accelerator. Evaporative cooling from wet fur can drop body temperature faster than the rain itself. This is especially dangerous after high-activity walks, when the dog is already warm and the coat is fully saturated. A windbreaker — not a raincoat — is actually the more important piece of gear in the post-rain window.

A fully waterproof jacket that doesn't breathe creates a different problem: the dog's body heat and moisture have nowhere to go. During active outdoor time in warm, rainy weather — Taiwan's spring and summer rainy season being the primary example — a low-breathability raincoat can overheat the dog faster than light rain exposure would. PETT2GO raincoats are built to 15,000 g/m²/24h MVTR, ensuring that waterproofing and breathability work together rather than against each other.

Taiwan's rainy season brings sustained humidity that accelerates fungal spore counts on grass and soil. Dogs with wet fur — particularly around the paws, belly, and between the toes — are more vulnerable to fungal skin infections after outdoor exposure. Leptospirosis, a bacterial disease carried in contaminated puddle water and wet soil, is also more prevalent during rainy months. Reducing wet fur contact time and rinsing paws after rainy walks are the most effective preventive steps.

Rain, overcast skies, and low-light conditions all reduce how visible a dog is to vehicles and cyclists. A dog that runs ahead or moves off-path becomes genuinely hard to track. PETT2GO jackets include 3M reflective piping specifically for this scenario — visible at distance in dim or rainy conditions without requiring battery-powered accessories.

Single-coat breeds — Dobermans, Weimaraners, Italian Greyhounds, Vizslas — have almost no insulating undercoat. Rain penetrates their coat immediately, and once wet, they lose body heat at a rate that double-coated dogs don't experience. For these breeds, rain gear isn't optional comfort — it's thermal management. Even a light drizzle on a windy day can push a single-coat dog into genuine discomfort within minutes.