Jack Russell Terrier

Why do Jack Russell’s shake?

Jack Russell Terrier on the bed

Jack Russell’s shake mainly to expel excess energy that has built up. Since the Jack Russell breed are known to have high energy levels, it’s in their genes, they need to burn it off, and if they don’t, they tend to burn it off by shaking or trembling. Expelling excess energy is the most common reason why they shake. However, there are a few other possibilities to consider please see below.