One thing I have to give to the trike that not many don't. Yes the berries duh, but it's knock back. When timed right any level trike can kill any level Dino that is effected by it. And someone said but they are completely wrong the knock back does effect the Rex. I swear any level trike can kill a 150 Rex. Practice timing your shots. Make sure you use your stamina for the fight. With each knock back, move your trike back to gain alil more distance from the target. When it's coming back, stop, regain what lil stamina you can. My level 25 killed a 120 Rex. Practice practice practice as if you miss you shot and the Rex hits u. Your in trouble.
I can not stress enough to my friends how useful the trike is. Early game it makes a great pack animal. Late game in groups of three or four it can be used as a decent battle mount. Taming a trike early on can be a great way to start a large base and keep you well fed with berries.