I have a list of problems I'm having with him, but my main concern right now is that we have a big yard, but no fence! We live in a development, so we can't just let him run free. He is terrible on a leash, and when he's on it, he turns, growls at me, and bites me hard enough to draw blood. Every. Single. Time. To the point where I dread taking him out even for potty breaks. Standing still is not an option, he doesn't give up even after a few minutes. Walking away is not an option, he bites and growls even worse. I've picked him up, and he's bitten my face. (Can Brittany pups become aggressive??)
Is an invisible fence a good option with Brittany's this young? I feel part of my problem might be solved by allowing him to run freely, and no longer having him jerk on his neck every time he decides to run full speed in the opposite direction. Or does anyone have any other option? I am trying my best to love him, but my patience is wearing thin with him. We also have 2 children, and they can't even come near him unless he is sleeping, for fear he will also turn and bite them. (I'm not taking playful Brittany puppy nipping wanting them to come play. I'm talking they walk into a room and he growls and bites them immediately) My kids insist they love him, but they are also becoming fearful of him. We've been around other puppies, and never experienced this type of puppy biting.
(Side note - We have him in Puppy Classes. We are doing basic positive obedience training, he listens when he wants. He pees in his crate. He pees in his Ex Pen. He pees when I have him tethered to me in the house. I am home with him 90% of the day and take him outside to play 3x along with regular potty breaks)
Please help me

