In another thread, someone posted that cabbage leaves are toxic to your chickens. The link they gave to back up the comment (the link is very appreciated, by the way) is: http://www.poultryhelp.com/toxicplants.html#B The comment on the link is: CABBAGE (Brassica sp.); leaves; plant is goitrogenic. And a definition I got for goitrogenic is: Goitrogens are substances that suppress the function of the thyroid gland by interfering with iodine uptake, which can, as a result, cause an enlargement of the thyroid, i.e., a goitre. I noticed on the link that broccoli and cauliflower leaves are not mentioned. I realize that most toxic plants act over time and the results are usualy not immediately apparent. I'm also aware that things eaten to excess can cause problems where things in moderation do not. I see a lot of postings where people hang a head of cabbage as a special treat for their chickens. In the link, the leaves are called out as toxic, not the head. I'd appreciate comments from knowledgeable people on this please. Should the treats chart be modified to caution against cabbage leaves. Have I missed something?