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
Everyone seems to be a moron here. Put it in any slot. Use that slot when it burrows while you're looking at the hole. So if it's slot 1 then you press 1 to use it while you're looking in the hole. DONT HAVE MULTIPLE HONEY IN ONE SLOT. It will take all of them and it messes up the taming for some stupid reason, probably because the game is a garbage mess. Nobody here is clear. When people say "just drop it" you'd think to press O in your inventory to drop it, but that's completely wrong and anyone who says that is just a moron. Sorry but I'm a little triggered at how many tips I had to look at before I actually just figured it out myself.
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 .