LouDog is almost 4, very kind and easygoing. He plays at the park off leash fine (although mostly with females and smaller dogs, he leaves the males alone). We do all the patience training with food, leash, toys, etc. But on walks (leashed) as soon as he spots a dog he starts- he stiffens and lays down seemingly wanting to play. But if it’s a male or anything bigger than him, he all of a sudden LUNGES and we have to hold him down with the leash. He growls and barks like a madman. People are freaking out and so I am. I don’t know what to do. He weighs 50kilo (he’s way too muscular) so I’m really struggling. I’ve tried the treat thing so he focuses on other things but he has absolutely no interest when he sees another dog. I think he just wants to meet them because he usually quiets if they walk up and let him meet but when he reacts like this nobody wants to meet, understandably. It’s a nightmare walking him and the smaller town we live in let’s just say most people now cross the street when they see us(which doesn’t stop him. He’s very kind with any dog he does meet but very sketchy about other males. Please help I’ve tried everything- info from the vet the trainer tips on Labradorsite etc but he shuts out everything except the other dog so nothing helps. And he’s so strong that I actually get pulled across the road if he really pulls I can’t get him to walk by my side either he’s always up ahead because he’s so busy with hi a nose in the ground. I’ve ruined my shoulder from his pulling and also spent way too much on training class which never helps once we’re out on our own. And now he’s 4. I’m EXHAUSTED.