Dogs sleep more than us, but they wake more frequently than we do. How much and when they sleep depends on the level of activity in their environment. A dog living as a pet in the home is likely to sleep more than a dog that works for a living, like a search and rescue dog or a dog working on a farm.
In the colder winter months, some rattlesnake species enter a period of brumation, which is dormancy similar to hibernation. They often gather together for brumation in large numbers (sometimes over 1,000 snakes), huddling together inside underground rattlesnake dens or hibernacula.
JAWS! The jaws of the snakes are not fused together. That means that unlike our jaws, snake jaws are not connected at the back of their mouths. This makes it possible for them to eat very big meals, bigger than their own heads! That would be like you swallowing a whole watermelon!