sounds like my lucy-the people at the pet store laugh at me when i ask for a smaller toy for a strong chewer... you have to be careful and read the packaging because a lot of the nyla bones and other types of chew-toys are NOT edible... but there arent too many that will last more than a day that are edible.
lucy likes the kong every once in a while, that thing is indesctructable, but its her last choice.
let me know if you find a toy that holds up-i'd definately be interested!!!