Enrichment Advice Try to pick one to three different enrichments to enjoy with your rats each day. Try not to be predictable or repetitive. Keep the enrichments full of variety and change to keep your rats continually stimulated. When it comes to using treats for their activities, don't over do it. You don't want your rats getting obese. We recommend using things like plain air popped popcorn or Rice Krispies when treats are involved in the enrichment.