A hungry snake will flick its tongue, become increasingly active, and display a regular schedule of prowling and hunting behaviors. Although the frequency of snakes eating varies depending upon several factors, there is still a basic rule of thumb in place as to how often you should feed a pet snake: Younger and smaller snakes should eat twice a week, while large adult snakes should eat once every week or so. However, you shouldn’t be surprised if your snake declines food when the temperature drops or becomes hungrier when spring approaches. While snakes don’t eat very often, they do have seasonal patterns in their eating behaviors.