I bought a number of different supposedly "tough" balls to send to freind who has a ball crazy retriever. Of the various balls in the group the huck has obviously become the favorite. My friend posts frequent photos on a photo sharing web page of her dogs on walks and swims - and the huck is always along. I don't think her dog is a super agressive chewer, but she had previously been going through tennis balls frequently - no more. After several months she is still carrying the same huck.