The first heavy shower is a difficult moment to introduce unfamiliar clothing. A raincoat can feel, sound and move differently from a harness, so give your dog time to investigate it while there is no pressure to leave the house.
Dogs Trust recommends a gradual, positive introduction to a coat, starting with investigation and building towards wearing it. If the dog retreats or appears uncomfortable, take a step back rather than forcing the garment on.
Start with the coat off the dog
Lay it where the dog can approach or move away. Reward calm interest. Notice whether fasteners make a surprising noise or whether the material rustles. Practise those small sounds at a comfortable distance before combining them with touching the body.
Follow the coat’s fitting design. Some slip over the head; others fasten around the body. Do not pull a dog through an opening with food while ignoring signs of hesitation. Keep sessions short and finish while the dog is still comfortable.
Check movement before checking the weather
Once the coat can be worn briefly, watch ordinary movements: walking, turning, sitting and toileting. Look for rubbing, restricted shoulders or fabric that catches under a leg. A dog standing still for a photograph has not completed a fit check.
Consider whether a coat is appropriate for that dog and the conditions. Coat type, activity and temperature matter; a thick-coated dog does not automatically need extra insulation because rain is forecast. Ask a vet if health or temperature regulation is a concern.
After the first short outdoor use, remove and inspect the garment, then dry it as directed. Note any change in movement or willingness to walk. The aim is a useful piece of equipment the dog can tolerate comfortably, not proof that every dog should learn to wear the same thing.