Our dog was really excited to get the Huck and totally ignored the Kong after getting it, but after about 2 hours, she managed to chew off the little nubs around the indentations in the center of the ball. It would've been better as a slightly smaller, but solid ball with no grooves probably. It seems like she just looks for little things to wear down till they break. Oh well. We got her the Hurley as well but she has to wait till xmas for that one :) It looks like those have held up a little better, but the ends don't look promising