As far as the clover toxicity, I am still trying to find a legit resource that discusses the toxic principle... I found information on moldy clover, which is toxic like any other spoiled grass/hay source, and the site on BYC lists Alsike clover specificially, which has been linked to photosensitization in horses for sure. The general consensus I found online (again, lacking legit resources here) is that red/white clover is fine, they have red clover and chickory in their mix right now. I'll try a pubmed search when I get back from work and see what I find and post here. Anyway, my guys did fine but also didn't get a ton of it, more to supplement the green portion of their diet when I was paranoid that they were all going to run away if I let them out of their run 
