Hello! I'm new to this community and have decided to look outside of Google search for help on this issue. We have a one year old Sheepdog who is relentless in chasing the cat. We have installed baby gates in our house to lessen the issue, but it still seems to happen. As you can imagine he is a high-energy dog. We tend to his needs as best as possible, but at the end of the day he can continue to go, no matter what we do. We train him daily, run outside, swim, play fetch, socialize, go to the dog park, you name it, we probably do it. So, he chases the cat, this has been happening since we've had him. We only train with positive reinforcement. But I feel like I'm at the end of the rope. I realize it was something that should have been diminished in the beginning, but alas, it didn't happen. My question for you all, what can we do? We hold training sessions with the dog and cat, and he's okay while he's supervised. I've turned to leashing him to the couch leg when I'm around the house. I realistically can't watch him 24/7. And these outbursts seem to happen when the back is turned. They only take seconds. The cat jumps over the gates (which are end to end in an "L" shape) to enter a room the dog is not in, and he is at the gate and knocks her down into the living room where he is. Then, well you know, he goes insane, chasing her in circles. He's faster. Now, this happens regardless of this energy levels, he can be asleep, and in an instant he is ready to go. I really feel at a loss of what to do. It feels like my family is being divided, me and my cat, and my SO and our dog. Anything helps, Thank you!