Great auto harvesters for berries. Set to wander in an enclosed area with berry nodes and pump weight since adults stop auto collecting at 50% capacity. Take the berries/seeds you want then drop the rest and let it go gather a fresh set. Fyi also works when left parked on berry nodes. So long as the area they are left in can be un/re rendered easily to allow nodes to respawn
When tamed,the moment it receives damage it can attack back immediately,something like instant counter attack,which is very useful against a pack of dinos. Also its a version of Therizino on russian drugs for abberation,best wood gatherer.
Make a 1,1 to 3,3 stone dino gate sqare for each roll rat . Get a karkinos and put 1 or 2 in each pen and when you need gems just jump into the pen with the karkinos hold the roll rat/roll rats for around 1 minute to be sure let them go and they will borrow immediatly then wait for them to surface grab them again . You will have aprox 20 seconds to grab the gems before they disapeer so grab them . Now let the roll rats go and to reapeat this step you must run a certain distance way from the roll rats to stop them from aggroing .