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.
During this hibernation phase, they are often collected by people to be sold as pets. The garter snake is similar to other non-venomous snakes in its desire to have a den, preferably under a large rock or other support structure. For this reason, garter snakes are often found along building foundations, under steps, or in rock walls.