I've hunted cattle and hogs with him for years, and it rarely becomes a problem.
He has all his dogs on a "get out" command, and when he uses it, they do it!
In fact, sometimes they go to the truck and pout.
We've hunted cattle for 10 or 12 hours a day and hogs that night, with the same dogs.
They figure out which one they need to be hunting in a matter of minutes.
Once, at a ranch in Crosby county, we gathered cattle from sun up to sun down, then when it got dark we started hunting hogs with the very same dogs.
As we rounded the bend, there in the road stood about 30 head of cattle, the dogs went right through them, hardly looking at them.
They know with very little direction what they are to be hunting.
Heck, when you use them every single day for one or the other, they get good at it.