I have a 18 month Bull Mastiff whi is extremley ignorant in most situations, we have tried ignoring him, training him on a whistle e.t.c but to no avail, we even took him to training classes when he was a pup. We have 2 but the other is a cross with a Saint Bernard and is fantastic, we can even take him out without a lead. But the other is really hard work and very strong (pulls all the time on the lead). We bought a halti to stop him pulling put it irrated his eyes.

Can anyone help?