This is how prayer works: Tink and I were one hour into a seven-hour trip home from Memphis.I’d been on a book tour for two exhausting weeks and had a stomach bug, very rare for me. Our good friend and house sitter, Kathy Lanning, is alert and doesn’t miss a thing.She sent a video of our miniature donkey, Sweet Tea, who was limping painfully around the barn. Limping is not good for an equine. It…