You can put points into weight, but it should still make stuff even when over encumbered. These guys are awesome little cavern crashers, if you put a bunch or all points into health, you can use these guys and throw them to enemies like bats in caves so they attack the beetle and you can shoot them from afar without getting mega rabies. Also, since it has a bunch of health points put in you can just bring it back to base. Bring spoiled meat too, so you can tame more if it dies and heal it super fast. Too tame, just feed spoiled meat or poo.