Over Rover is one of the best and most successful trainers in upstate NY. They are in Cato. They are bully friendly and have owned and bred Bull terriers and Pit Bulls, and own Bostons and Staffy Bulls. Jill's dog was ranked 3rd in the country last I knew and has qualified for and competed in Nationals MANY times.
They currently have many bull breeds as students, including my own.
I wont train agility anywhere else. (And we have classes where I work)