They're ok ig,I don't really tame them. Personally I prefer ya to tame a stego instead of these guys since stegos are overall just better in everything including stats wise,I even Personally would use parasaurolophus over trikes since paras are easier,collect barriers earlier in game in (level 10 for para level 16 for trike sadel) for narcotics gathering and then ya can switch the para with a stego later