I saw my reply on this thread from a few years back. My how things have changed from their puppy days. Nothing stands up to my dogs chewing. We no longer can use antlers because Zoey broke her molar on one. Kong makes the most durable toys. Round toys do not last but the long shaped ones do. We buy quite a bit from Chewy.com. These are the only toys left that have withstood the test of time.

West Paw Zogoflex Hurley Aqua Blue Dog Toy

http://www.chewy.com/dog/west-paw-zogoflex-hurley-aqua-blue/dp/42966

KONG Squeezz Stick Dog Toy

http://www.chewy.com/dog/kong-squeezz-stick-dog-toy/dp/38424

KONG Jumbler Ball Dog Toy

http://www.chewy.com/dog/kong-jumbler-ball-dog-toy/dp/105499