Honestly, rehoming won't solve anything "really". Your problems will just be passed on to someone else. I am sure he would be completely devastated after 8 years with you. These sound like fairly simple behavior problems and I wouldn't re-home just because you are now in a state of stress. I get it, I do... but don't do something you may regret a year from now, or 2 years from now, etc...
My dads JRT mix is almost 7 and has an attitude problem. She growls when you lay next to her while she's sleeping, she hates other dogs, she barks at everything that goes by the house, but honestly? It's our fault. We're lazy, she's set in her ways, we've just kind of accepted the fact that she is going to be her. Rehoming wouldn't even be an option at this point. Even though she acts big and tough, and can be a royal PITA, at night when she's scared of thunder, and curls up with my dad, all tends to be forgiven even if for just a moment.
Walking an hour a day is GREAT.... definitely keep up w/ that! Maybe work on some mind games. For Jackson, a high energy pup as well, sometimes he gets more tired from a 15 min training session than an hour long walk. Use clicker training, teach some new tricks, work his little mind a bit, and at the same time, re-create a bond between you. Use food puzzles, I like Kong Wobbler, but there's tons of dog toy puzzles out there. I also use a little 'Donut' as a balancing thing for him to do. A lot of these indoor activities keep him busy and satisfied and less likely to be annoying. |