We adoped a mix-breed dog (looks like a hound dog, and genetic test done years later came up as terrier, coonhound, German Shepard). He was pretty much out of control the first year we got him (he was about a year old). Took him for walks 2-3 times a day. But he was constantly barking, would jump or tunnel under our 6 foot fence and run away, also in the evening would tear back and forth the length of our house barking and jumping on us. I was really ready to re-home him. I think it was the 2nd dog trainer we talked to said, you really need to be exercising him more. And we are like, we take him for walks multiple times a day. And she was like, no, I'm talking about an hour in the morning, an hour in the evening, walks are not going to cut it. Also suggested other activities he could do. But we didn't follow advice so we put up with a crazy dog for a couple more years until we did work it in more. My one regret is that we didn't get him into scent trials, this dog's nose is so good he sniffed out a rat from over 50 feet away who was hiding, does the same for possums and outside cats (we don't let him chase them), he would have really made a good working dog.