My guys get very few treats...the occasional "Snaffer" chicken-based treat, and an occasional dollop of hairball goo, which they seem to love. Why? Because the food I give them seems to satisfy them to the point that they don't look for treats. What do I feed? Whole chicks, mice, small rabbits, turkey pullets, and the occasional quail egg....they do fantastically well on it. Personally, I would never give any fruit-based treat and especially nothing with peanut-butter or marshmallows..I can hardly think of anything much more distant from a Mustelid's natural diet... I am not surprised that people are reporting blockages. Remember, a few thousand years of domestication is a tiny blip on an evolutionary/adaptive timeline....nowhere near enough for ferrets to adapt to a diet any different from that of their ancestors. G. A. Christian Bilou [Posted in FML issue 3603]