I have an 8 pound digger! She is a master of escape. These prevent her from digging under the fence and give me peace of mind.
They work. A very determined dog has not escaped since we installed them. We did find them difficult to install without bending them, which detracts from the appearance. It would also be great if they came in black to not stand out with black fence.
Helpful. Fairly easy install. However, free tool to assist with install arrived after the guards. Hence, not helpful with installing.
Have been looking for a solution to our Bloodhound breaking thru our wire and wood fence at grass level. This was the perfect solution, excellent product.
My dogs dug in the dirt till they reached the end of barrier and pulled off the bars. I had to add cables at the bottom to prevent them from being broken off

 
 