They do not have a tread wear warranty, most tires don't and if you had read the information from Treadwright you would see they have a decent warranty of 2 years.
You need to quit running the trails you have been until you get a CDL.
Most people get around 45,000 miles from a set of Guard Dogs which is great when you consider you only paid about $106 for them.
How much air pressure do you run when off road?
Contact TreadWright with your concerns. They have excellent customer service. Like Mike said, people usually get crazy mileage out of their TreadWright tires. Something is definitely not right. It may be on your part or it may be the tires. Call 'em up and let them decide.
Thanks all. Coincidence or not, I waited because the guard dogs were out of stock at the time which I wanted them. Maybe a bad first batch was made or something, I filed a claim with TreadWright and will call tomorrow.