I've tamed a Theri and a Sarco (and my griffin I wanted to tame got away cuz it chased a stupid Pteranadon)but yeah,get 4 stone Dino gateways and 2 Dino gates,place the gateways in a line like this | | | | (the lines represent the gateways) and put the gates at the ends(NOT ON INSIDE),make sure there aren't any gaps that they can fit through or glitch through cuz THEY WILL GET YOU,anyway,moving on from that,once you make your trap (on flat ground cuz I forgot to add that) find an allo,if there is a pack,I suggest run as fast as you can to a Dino they'll get distracted by,or if ur on a mount that can run,then don't even worry about the Dino just run,and if the mount can fight,then beat the heck out of the lowest lvls (if u want high,if just wanted low then beat the high) and lead the last one into the trap,after that,knock it out with tranq arrows (idk how many,but I suggest atleast 2 stacks tho) with a crossbow,if you don't have crossbow I think bow works too,but if you use crossbow than shoot it and wait about 5-7 secs (like with griffin so you don't kill it) between each shot,then when it's knocked out,shove some prime or cooked meat down it's throat and then BOOM you've got an allo,and this trap can be used multiple times,cuz like I said in beginning it helped me tame Sarco and Theri,thanks for reading and sorry this is so long,bye!

-Kiara