Actually what I was really wondering is if it would harm them or not? I've read some conflicting info about it lately & it got me concerned (along the lines of what Lynn stated). I have used bales of alfalfa & they really like it this time of year. I only put it out in small doses though, as in 1/2 bale per feed site, per week. I generally only use it in Jan/Feb/March each year. The reason I use it is that deer are the only ones that seem to eat it. When using corn the coons & turkeys eat a large portion of it.