Gin here will give you the test data. However it is just an average with every run being slightly different. Just make sure it has never gotten wet as some places used to do to keep down dust. That makes nutrients unavailable and can cause mold. We would not be able to function here without gin trash and use it every year. Not sure your location but the worry about gossypol poisoning is only in a particular type of cotton mainly grown in the desert I think upland cotton but don't quote me on the name. Which ever type it is not grown in the southeast I think west Texas and Arizona . I don't think the defoliation chemicals they use is the bad stuff anymore but may want to check with the gin. If you are worried about your bulls just feed them something else. We don't have bulls with cows during time we feed supplement feed. By bull turn out they are back on grass or at least rye grass. Which may not make this year as cold spell really did damage and knocked it back or maybe killed it waiting to see.