just some thoughts... We had probs with critters like raccoons & skunks grubbing in our yard. I bought some Critter Ridder at Home Depot and that seemed to work okay. It's supposed to work on pets, but doesn't last long if it rains. Soaking the top of the fence with something like that (there are other options) might discourage the pet. OFC the question is how determined/ stubborn is the animal, etc. And then how aggressive, dangerous and vicious is the animal. I mean, what you don't want is the dog getting into your yard and then attacking someone on your property. BTW, a dog license for a vicious animal is alot more spendy that one for a well behaved pet, in some locales.Any of you have any suggestions on how to keep a neighbor's dog from jumping my fence to get into my yard? At the moment I'm trying to dig some rusty chicken wire out of our garden that we haven't used in about 2 years and attach that to our fence. Today I chased it out my yard with a broom while screaming at it. I feel bad for the other two dogs that got extremely scared and were throwing themselves at their door to try to get back in their house.
Neighbors on the other side have a wonderful boxer whom I've met and talk to anytime she's outside and when they have her in the front yard either getting back from a walk or just with them their I'm always happy to go talk to her and pet her. She can be very jumpy and excited but all you have to do is tell her to calm down and she does to get pet. She's well trained.
Something like critter deterrents might be worth a shot if talking to the owner like jmdirt says doesn't work. And then if neither of those things works there is the nuclear option - reporting it to the city (especially if you have leash laws & ordinances that govern that type of pet [and owner] behavior). If your town has those kind of regulations, then they probably have an animal control officer or code enforcer. Ours has both. Plus you can look up the codes online. What the city can do is write a letter to the owners to correct the problem or face fines or be required to purchase a more expensive dog license.
But I don't recommend HOT WIRES on the fence. My neighbor tried that with a habitual jumping/ escaping dog. I used to play fetch with that dog in their front yard when he was a pup. That animal became vicious after getting electrocuted while successfully escaping over or through the hot wire (and worse, while he was getting soaked by sprinklers - so he was electrocuted when wet). I was home that day he escaped, screaming bloody murder as he got shocked. Peeking over the fence, I discovered his sprinklers were soaking the entire grass kennel/ pen and he had no doghouse to take cover in. Moron owner ruined the dog, a normally nice mix of black lab & german shorthair.