My year old lab/rot mix puppy is scaling the chain link fence and off he goes for a romp in the woods. Is it possible to extend the height of the fence or what other possible ways could I keep him in?
I wondered about the 'invisible fence' if strung along the top of the existing fence, would that work?
Thanks for any suggestions/.
I'm reluctant to tell you that an invisible fence strung along the top will work because every dog is different, and you never know. Still, I think it is a good idea to try it. By invisible fence, I mean the sort where a wire plugs into an electrical source, and a collar with a battery zaps when it gets too close to the wire.
We have that sort of invisible fence running around the inside of our regular fence. It worked perfectly for a few years. Then our dog suddenly decided/realized that the zap was brief and that she only had to endure it for a second while she escaped out obvious holes. Poor thing has been spending a lot of time indoors ever since.

The best suggestion is to make sure you're outside with your pup supervising and playing with him, not expecting him to live outdoors and amuse himself there.
Lia
The best suggestion is to make sure you're outside with your pup supervising and playing with him, not expecting him to live outdoors and amuse himself there.

Great advice, but sometimes even supervised pups scale fences. Our Doodle was never out by herself in DH's back yard, particularly because it wasn't fully fenced. One day, when he was playing fetch with Tracy, she tried to climb the chain link fence and succeeded. He turned & saw her on the other side of the fence and asked her how she got into the neighbor's yard. She showed him by climbing back into his yard. She can also clear the fence by simply jumping it.
When we moved into our house, she would jump the gate while we were out with her. We put up a visual barrier and she hasn't tried it since. She could knock the piece of lattice off very easily, as it isn't even affixed to the gate, but she hasn't tried.
My year old lab/rot mix puppy is scaling the chain link fence and off he goes for a romp in ... about the 'invisible fence' if strung along the top of the existing fence, would that work? Thanks for any suggestions/.

Invisible fences are pretty worthless. A plain old electric wire fence will work much better. Since you already have the fence, all you'll need is the standoffs, the wire, and the charger. You should be able to get everything from the co-op for well less than $100. And, it really does work. If you put a strand at the top as well as the bottom, it'll also keep deer out of your gardens.