No the one choking lives by himself.Welcome to the forum!
Some piggies cough when they eat veggies (to fast). So if you only see this while he is eating, it probably won't mean anything bad.
But if it also happens away from eating or you notice anything else (like a running nose, watery eyes ...), please have him checked by a vet.
Are all your males living together?
Yes, they still rumblestrut and try to hump but no fighting just seems to be establishing dominance.It’s usually because of eating too fast. If you are worried then see a vet.
Are the two boys you still have in the same cage settling down as a pair ok?
Yes, they still rumblestrut and try to hump but no fighting just seems to be establishing dominance.