What grade would an ibex comfortably climb?

I think they could prolly do Disbelief 5 15b.

One time in El Chorro we were walking past a cliff that we thought to start in, but didn’t, because there were goats scampering up the rock face. With multiple bolt lines. The routes there were maybe 10-, but the goats might have cheated and did a 5.7 linkup traverse...