We are starting to think about a new dog and I've always fancied an ACD. I've had a Shetland sheepdog, a golden retriever, and a Rhodesian ridgeback x 2. The last two were the RRs. The RRs were the last two. I did agility and scent work with my Sheltie about a million years ago and would like a more working dog this time round. Anyone have any experience of ACD? Are they as bonkers and high energy as a Border Collie?