My dog is attached to a runner in the back yard. He keeps slippiong off his collar. I have it tightly around his neck but he slips off over and over. Do any of you know of a way to keep a dog in the yard without the dog jumping the fence. By the way,
He's a big dog and the electric wire around the yard doesn't work.

There are some dogs whose neck is large enough that even when properly fit, they still manage to pull out. I find the adjustable fabric collars often adjust themselves and come off. I use leather collars. You could try a harness.

I see nothing wrong with tethering a dog on a runner for short breaks outside to relieve its self. I used a tether for years, leaving the dog outside on it as long as it was happy out there. I still tether them in the front yard sometimes when I am working out there.

My sister-in-law had a problem with her dog jumping the fence; she found a "jump harness" on the internet, but never bought one. Her dog is a big baby and the electrified wire worked for him, lol! But here's the link, if you are interested:

No Jump Harness - Dog Harnesses at Arcata Pet Supplies

I have no idea if these things work, if they harm the dog, etc. I don't know anyone who has ever used one; but maybe someone here does, or you can find more info with a Google search.

The no jump harnesses work well Jillian but the dog needs to be monitored if wearing one. They are to be used when you are walking your dog to keep him from jumping up on people. I wouldn't recommend it for when a person leaves the dog outside on a run. A regular harness that is properly fitted should keep the dog from escaping. I would rather see a dog run "chain" attached to a harness than to a collar. It is safer for the dog because there isn't a chance he might choke himself.

That makes sense, Ruby. I'm sure a dog would be more likely to injure himself wearing one of those unsupervised. Maybe that's why my sister-in-law didn't buy one! Thanks for the info! :)