I have a Welshie X Traditional and she HATES the rain. I found her shivering last week and quite honestly she seems to grow very little Winter Coat, she
didn't last year either, so I rug her. She was in a L/W TO M/W and then
I found her HOT

I changed her back to a L/W but she wasn't happy
tonight. I didn't move back to the slightly heavier weight rug, thought
I would leave her for a bit longer and she does have shelter.
Shetland, couldn't care less, rain, shine, wind, whatever and has a
really nice thick coat, only problem is he is constantly FILTHY