So our Russian was an amazing eater after we got him. His previous owner only fed him red leaf lettuce and romaine lettuce and had him a really small enclosure. After we got him we were feeding him a wide various of broad leaf plants suggested from all the forums and books. In the last two weeks though he has refused to eat anything but mustard greens. He will literally go on a food strike. So we give in after two days of not eating anything we place in from of him. (We have had him for six months, never an issue with eating before.) Any suggestion? Anyone else come across this?