A long and bushy tail, for instance, is a useful balancer and is a not uncommon feature in mammals which lead an active arboreal life.
In the Malacostraca they are chiefly sensory, the endopodite forming a long flagellum, while the exopodite may form a lamellar " scale," probably useful as a balancer in swimming, or may disappear altogether.
We suggest that you always suspend them over the work bench using a balancer, which also improves productivity.
The yard I used to work at used to feed oat balancer along with oats + garlic & honey.
If increasing the feed results in over-exuberant behavior or weight gain then add a balancer as these will provide nutrients without energy.