These are the BEST dog boots, we used them on our young Vizsla that had a paw injury, and he really put them to the test….up and down hills full speed! Boots stayed on and paw was protected. We have an older Vizsla the has used the same style of boots for years, same results…EXCELLENT! Two big tips we learned along the way, mark the shoes Left and Right…yep it makes a DIFFERENCE! Use socks, we like the non-slip variety.