My rescue mutt jumps my 4’ chain link fence too. Drives me mental because I have this big beautiful backyard with a very nice, secure fence - and it doesn’t do a damn thing to keep my dog safe!
At first he figured out he could leap over the neighbor’s 3’ fence with ease when the snow was 2’ high. I contained him with a manual shock collar until the snow melted, and then I had a 5’ fence installed on that one side of the yard. He cannot get over the 5’ fence.
But then he figured out the 4’ fence - not a running leap but an actual CLIMB - and now he’s off. Luckily he comes back but I don’t like it one bit.
Right now my problem is that he is very well trained on the shock collar. I’ve used it to beep and buzz him in other situations (not shock), but when we’re in the yard he sits with me on the deck. He won’t go to the fence and he doesn’t try to jump. Great, right? Except I can’t train him if I can’t catch him in the act!
I’ve been outside with him 100% this spring and summer and he’s left the yard about 7 times while I am verbally trying to correct him. He did stop once but once he sees that squirrel, it’s game over. He’s in doggy la-la-land.
It’s the squirrel that does it for him, by the way. He’s not un-exercised or bored. He doesn’t WANT to get out. But he makes poor life choices.
He’s got a sister dog, by the way. Also a rescue. She is the same size and shape as him but does not have the hops he has. She stays in the yard and barks until he comes back (yes, he JUMPS BACK IN) and then wrestles him until we go inside.
Anyway…sorry, no answers. Just need to vent because it happened again today and it’s the worst. I’ve either got to get an invisible fence put inside my fence (but he’ll have to wear a collar and then be afraid of perusing the yard) or pony up to replace the rest of my fence with 5’ fence.
People have suggested that I add a PVC roller to the top of my fence but it’s ugly and weird and seems like a hassle on my very long fence. I did find this fence extension thing just now when I was searching for the PVC pic and that looks pretty promising. It was $2000 for 1 side of my yard for a new fence so this fence-extender might be waaaay cheaper.
Good luck - keep us posted. This has been driving me nuts all year and I need to get it FIXED so I don’t have to spend the freezing winters outside with the dogs!
ETA: If you do want to try the shock collar on her - which only really works if you think you can catch her in the act - this is the one I got. I didn’t need anything fancy or for super large yards. This works just fine. I love that there’s a beep and a vibe setting too. They’re all useful. Be sure to read online about proper shock collar training before just diving in!