I used to give my ferrets a dog treat that was fairly expensive and a bit hard to find - it was dehydrated chicken. They were essentially squares and reminded me of packing popcorn they were so light. They were in a round cardboard package and I only ever saw the small cans in pet stores. I found a single pet supply magazine source that sold large cans and mine got a few left out regularly every night, bit more of a kibble supplement than treat really. Mary [Posted in FML issue 5194]