I should probably give a response about the their and spino, so here I am. All the experience here is on console, so some information might be wrong.

So first, the theri is annoying, if you walk to close to it (which would be around the end of its claw) then it gets angry and chases you down until your dead. Do keep in mind theri is fast and deals good damage, and he also can hit the rider and deal torpor to the rider.

So now with the spino. I think you should try to move, or ride a tame that you don’t need that has good hp and is quick. At the point your at in the game, I don’t think your ready for a spino, unless you have 3 or more good trikes that have have great hp. And it also really depends on the level too, so if it’s a a high level then good luck trying to kill it. If it’s a low level you could kill it with a few trikes that have decent hp, like I said earlier. Restarting is also a option, but that’s your choice. That’s about all I can say, I don’t know how to help you at your current point in the game.

-Lamprey