[Dr Lee]

Shaking often a result of sympathetic nervous system responding to a problem. It can be due to infection - a body's effort to raise the baseline temperature and thus inhibiting bacterial growth. It can be a reaction to peripheral vasoconstriction when the body is attempting to maximize internal blood flow and pressures. This situation can be from pain and discomfort which might lead to shaking. Does this make them feel better? I honestly don't know Frenchy. The causes and responses of generalized shaking are fairly consistent over the mammalian bodies so what makes us shake generally makes them shake. For example, fear stimulates the sympathetic nervous system and will lead to generalized shaking. It is important to note that smaller mammals tend to have more prominent shaking than large animals. Exact reasons unknown but may have something to do with the fact that the nervous tissue and interaction of two animals is similar while their overall body mass may be very different.