As an Ex-zookeeper I enrich my snakes about 1 a month. There are several things you can do to get your snakes motivated1. I put a live mouse under a clear tub in the enclosure and let my snake get interested This may seem like a tease but he seems to like the challege.
2. I will put drops of smells in the encloser ( extracts from you grocery store )mint, vanilla, orange etc just (one drop). My python will go wild trying to figure it out.

Just my opinion but I feel keeping them active makes them healthier.

There are many other ways to enrich your snakes just drop me a PM and we can discuss. ( always make sure the enrichment is healthy for your snake)