My sister has alot of experience with dogs and she thinks that it is odd behaviour for him to pace in and out of his crate, do you agree? I don't think it is odd he only does that when I am dozing in the easy chair or couch, I think he just doesn't know what to do with himself. My sister thinks he has control issues with his crate, he growls at the cats when they come near his crate while he is in it an sometimes the kids too. My sister thinks I should discipline him for this, which I do, when he growls at the kids, now he growls occasionally when I am out of the room, busy with laundry or dishes, and the kids will say "Wrigley growled at me in his crate" so I will go in there and tell them to go to his crate like they did before and he won't dare growl with me watching. My sister finds this dangerous and I agree, so Wrigley is never left alone with the kids, am I missing something?
I agree with you that he is bored and doesn't know what to do with himself. He is a 1 year old, teenage boy. He is just getting warmed up when you are finished with his walk.
I totally agree with others that he needs more exercise both mental and physical.
How much training has he had? Training is a mental exercise for them.
When you go for your walks, are they controlled? does he heel? or is it just a walk to potty and then back home.
How much exercise does he get? Do you throw the ball for him? Does he get to swim?
Get him enrolled in a training class that the whole family can participate in. Have each member of the family work with him.
For now, ignore the growling while in the crate as long as he isn't doing it while you are around. I think with more exercise and training, that may disappear. If it doesn't, consult with a behaviorist or professional trainer for the proper way to handle the situation. Since no one here has seen a video of what you describe, it is impossible to give you any advice on how to handle. If handled incorrectly, it could make matters much worse.