We have a border collie /black lab mix, and she's a good dog. She has the body shape /size of a lab, but she has the thick, thick fur and coloring (black body with white collar, stomach, paws) of a border collie. Her hair is so thick that we get her shaved every spring (she's an outside dog), and it makes her sooo happy: when she comes home from the groomer, she runs and rolls around like a puppy. The fur grows back good and thick just in time for cold weather. She weighed 69 pounds when she went to the vet last spring.
When she was a puppy, she was a terrible chewer -- destroyed a number of things in the yard -- but she outgrew that.
She's not a smart dog, not a bit; I don't know if that's the Lab coming out or if she's just unusual for her breed. She's also not a watchdog -- she'd allow anyone to come into our back yard, anyone who'd scratch her head. If another dog barks at her while we're out walking, she'll hide behind us. But she is a very loving dog and has always been very, very good with the children.
Even when she was younger, she didn't "herd". We've had other dogs who "herded", and it was very much part of their personality, almost an obsession with them . . . not true of my dog. I think when you have a mix, you don't really know which traits you'll get.
She was very, very active in her first eight years but now that she's nine she's slowed down a bit; the vet says she has arthritus in her back legs. She used to run up to the fence and put her feet up so we could pet her. Now she just stands by the fence and wants us to reach over to pet her. Her face is quite gray now, and she's definitely a senior citizen dog. She still LOVES to go for walks, but she can't manage long, long walks these days.
Our dog lives in a one-acre fenced lot, and it's plenty for her. She used to run a great deal when she was younger, but she doesn't do that so much any more. She does love that our fence borders the road, so allllll the people who walk in our neighborhood stop and talk to her -- as I said, VERY friendly.
Someone mentioned cats. My dog has always hated cats. From the time she was a puppy, she despised them. When she was younger and stronger, if she saw a cat while we were out walking, she could almost jerk me off my feet in her pursuit -- she could make one of the children fall down in her desire to rid the world of cat-kind. LOTS of cats live in our neighborhood, and she takes great pleasure in barking up a storm and letting them know that they have no business anywhere near her yard. Earlier this summer when we were on vacation, we left her with a friend . . . we came home late Sunday night to find that three cats had decided to take up residence in our back yard. You could almost read their minds: "The dog's gone, we're gonna live here now -- ours, ours, ours." I didn't witness any carnage the next day when I brought her home, but I didn't see them hanging around anymore.
Our dog doesn't have a kennel, but she does love her igloo dog house, and she has a spot under the shed and under the deck. She definitely has to have a "home". She is afraid of lightening, and we never see her during storms.