I've been buying Picky Neb mealworms in a 5 pound bag to supplement my 8 chickens' winter diet for a while now, but I just added 3 new chickens and 3 new ducks to my flock, so I decided to go with the 10 pound box this time around. A few of my girls went through a hard molt this winter, but they all recovered nicely with the help of some extra protein, and they look beautiful and fluffy again. All my birds love mealworms for their morning snack, and most will eat them right out of my hand. These snacks are very helpful in making "friends" with the adult birds I add to my flock periodically. The quality of the worms has been excellent. Most are whole, they have a "wormy" smell when I open the bag, and no sign of contaminants or anything alive in the bag. The price for the 10 pound box is excellent and Prime shipping is the best thing ever.