Looking for a barier to plant inbetween my hybrid willows that will help stop the neighbors dog from coming onto our property? The dog sits under our car port at 2AM and barks till we chase it off then it runs back to the house squeeling like we shot it! There is a leash law around here and the animal control has come to their house atleast 4-5 times. They won't take the dog till the people answer the door which they know the what happens if they do answer so they don't! Anywho so I planted 30 hybrid willows which suposedly grow very very fast. They are 4-5ft. apart and I need shrubs to go between these that are low to the ground and will discourage any passer byes ?? any thoughts Only thing I can think of is pyracantha. Althogh full of long thorns in most cases maybe not enough? Kinda nice that it flowers so it won't look like we did this on purpose as we would like to enjoy the colors at the same time as a solid barrier. Not to mention even with our no tresspassing signs the neighbors walk onto our property and around the house when we are not home to get a glimps of my equiment around the house...taking photos so they can turn them into the local zoning office getting us in trouble on a regular basis.