Austin has two jackets that he wears in the late Fall and alot of the Winter. He is a hype Beagle always bouncing around but has very short hair, very little fat and easily gets cold. The jackets are mostly for indoors because we keep the house temp. fairly low. My other two have longer and thicker fur and I have never seen them shake. I rarely used the jacket outside in the Winter because we are moving so briskly that no one get too cold. Austin could easily do a fashion cover for "Beagle GQ", but his jackets are necessity not fashion statements.