Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to treat sunburn on horses [title] Identify where the horse is burned. [step] The most sensitive areas of a horse are the bare patches around their muzzle, down the bridge of their nose, their ears, and around their eyes. They can also develop sunburns on any light-colored patches on their coat.

Ending1: If you notice a sunburn, examine the horse for any other affected areas. [substeps] A sunburn will feel hot when touched. Ending2: You can tell if your horse has an affected area by picking up a brush or your hand and noting which spot is burned. [substeps] If you're unsure where the horse has been burned, simply look at the area. Ending3: The open site of an eyelid is the nearest known burn site. Other areas might include the lip, the ear, and the eyeball. Ending4: Check all surfaces closely to make sure nothing has been burned. [substeps] The horse's eyes are the most sensitive areas of a horse's face.

Answer format: ending1/ending2/ending3/ending4