I have a 6-year-old Arabian gelding who used to spend up to about 12 hours a day on our fescue pasture. As a 4-year-old, he developed lesions on his three white legs on the cannon bone area that were crusty, raw underneath, very sore, and made him lame. His hind legs swelled terribly. One veterinarian said it was scratches, one said a systemic allergy to fescue grass, and one had no idea.

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