I adopted a 6 month old cattle dog. He is now about 8 months. I walk him 3 times a day (20-30 minute walks morning, lunch and night) and exercise him with a longer 4 mile run, 5 mile bike ride, or hour of fetch when I get home from work. He is still constantly go-go-go and he hardly EVER takes a nap. He is also extremity nippy and bites constantly if we aren’t actively doing something ( tug, training, kong). He will hardly let me pet him or put a leash on him despite trying every trick in the book for stopping biting (my thighs are bruised and cut all over from his nipping) I know ACDs have tons of energy and will always need an abundance amount of exercise but in your experience at what age, if ever, did your ACD “mature” and be content with chilling while in the house and not constantly biting or needing attention? I know he’ll never be a couch potato but Im a single guy living in an apartment and he’s starting to drive me over the edge. It’s been much tougher breed than expected despite all of the research I did beforehand. I’m starting to think I just can’t possibly provide him the amount of exercise he needs and he might be happier on a farm or someplace he can be outside running ALL day. Thanks!