My four yr old catchdog definitely knows the difference. But for me it doesn't really matter, my open mouth hounds leave the county, they are not usually very close for my bulldog to hear them. They may open on trail a little bit when they are cold trailing, but not enough to get the CD excited. They typically open up a lot once the hog is jumped, and by that time, they are usually 400 yard or more away. Once they bay and drive up, my catchdog knows the deal. He doesnt get excited until I snap him on the lead rope and start walking in the woods.
Does your catchdog have hearing problems?? A HOUND barking 400 yards away and he cant hear them??

JUST KIDDING!!
In alot of the bottoms we hunt, you can hear a dog with no problems at a mile off...
I have one 1/2 plott that will chop on a hot track, and several of my buddies have a dog or two about the same...
I would say every CD ive had will get excited when they hear a bark... Heck so do I, and I know its trail barking!!

Like Tom said, when they hear the bay dogs bark, they know its game time..
