Gonewest, I actually agree with you. Yes, whole fuzzy cotten seed does have a drawback when fed to bulls as far as fertility. The reason why I use cotten seed hulls, and not whle fuzzy is for the bulk and to help get rid of many of the fines that accur when your pellets get beat around in the mixer, you loose mineral and soybean meal from most pellets to fines. The cotten seed hulls when mixed with more molasses get those fines to attatch to the hulls. The cattle will not leave a bunch in the bottom of a feed pan. It does add some fill, where pelleted hulls add next to none, and they are just another pellet to get smashed around in a mixer and create fines that your cattle won't eat. Pelleted hulls serve no purpose in my feed rations, I can get anything I need from them in a cheaper more afficient way. Hulls are the only way to go.
Mills don't like mixing with the hulls because it clogs up EVERYTHING. I have experience first hand with feed mills that just can't handle it. Those that can are just a step above everyone else when it comes to show feed.