Please advise: I need to know if the "Crimson Century" variety of Acer Platanoides (Norway Maple) is poisonous to horses. The leaves in the pasture where I board my horse are falling, and the concern is these wilted leaves may be toxic. I know this variety is not the Acer Rubrum, nor the Acer Saccharum, which are both known as highly toxic. I spoke with Dr. Robert Wright (DVM) in Ontario, and he said the affects of the Norway Maple are unknown, but to err on the side of caution, and to remove the horses from this pasture until the leaves have fallen and then rake up the leaves and depose of. Please confirm this finding.