I think you should definitely have him tested for heart worms, I hate to say it but those were my Gators exact symptoms starting a couple months before I lost him.
BTW I'm the guy with the blue horse trailer who bought all those shoats from you a while back. We barred every male and they're getting huge already.
Good luck with your dog, hopefully its nothin' major.
Good to hear those pigs are growing into hogs...watch the teeth, there are some buck tooth hogs on the property those came from
yeah I was thinking it's heart worms but he doesn't do the hacking in the field..I guess it's vet time again ..he's a good lil gritty sucker..I hate to lose him, if that's what it is...
I feed diamond sport dog, don't know what the guy I got him from was feeding...