This interactive map predicts the timing of color changes in leaves across the continental United States. Created to promote fall tourism reasons, the map is also a good tool for animal health pros to know when to warn animal owners about the potential for leaf toxicity.
Fall leaves can be toxic to horses, livestock, small ungulates
Source: smokymountains.com. Link. Experts say fall foliage is running behind schedule in 2019 similar to 2018.
Also see: Search results for: leaves, Animal Health Digest. Link. Red maple, black walnut, many oaks and wild cherry leaves are some of the toxic leaves referenced in leaf posts.