I've been around, hunted, trained, and culled my fare share of dogos, for the last 6 years - a few things I've realized - the ones that truly have it, will show interest by 8 weeks, it's your job to put time in the dog and let them have fun. They ARE very slow to mature and if you let them sit for a year like cur dogs without exposer, most will end up as culls.
Exposer, exposer, exposer - fun and enjoyable.
Freakin babies - big ol dogs like that.
Been wanting to breed to a fl cur for the last 2 years - one day, it just might happen
