You probably think these guys are useless and not worth it but if you tame a few low levels they can be SO useful, as they can incubate eggs. Using them on SE to incubate eggs is really handy because it means you don't have to have a generator that will need to be repaired from time to time.
Dimetrodon kibble is one of the required kibbles for imprinting. However, it can be difficult to see when they lay eggs, as they will be on top of the eggs. To fix this, build a pen and put them all inside. Then, put them all on wander. If you have a male, you can leave him stationary, or neuter him and put him on wander.
I heard that melee damage increases amount of insulation. Take with a grain of salt, but could be very useful, as you would only need meat to keep them running, and you would need less of these than air conditioners. Again, take with a grain of salt.