We have a nice wooden fence enclosing our backyard and our pool, but little did we know that our 8 pound dog would eventually wise up and figure out that he can squeeze underneath and/or between the wooden slats, thus rendering our fence useless. So I am looking for ideas/suggestions on what I can do to keep the dog in the backyard. We have a pretty big backyard so ideally I would prefer not to have to redo the entire fence... here are my thoughts for possible options but I'd like your feedback -
1. Make the dog wear some kind of big collar that prevents him from getting through the fence, like this site offers - http://www.puppybumpers.com/. I have no idea if they work though.
2. Invest in an invisible fence to keep the dog enclosed with a shock collar. I have no idea how much this costs and what kind of training is involved...
3. Go around the entire length of the fence and put some kind of wire or mesh at the bottom to prevent him from getting out. This seems to be the most tedious option and I'm pretty sure it will make the fence look ugly, so I'd rather not do this if at all possible.
Finally, here's a picture of the little rascal from when he was a 5lb. puppy last year and surfing for the first time.