Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to handle autoimmune skin disease in cats [title] Look for areas of fur loss. [step] If your cat's skin is irritated by an autoimmune disease, it is likely that it will lose patches of fur. Areas of fur loss should be noted and the skin underneath should be watched for signs of irritation and discoloration.

Ending1: [substeps] Blemishes at these places can be indicative of an autoimmune disorder. Autoimmune disorders are likely to happen as a result of blood clots, so the source of blood loss is often found near where the cells attach to the fur. Ending2: [substeps] Cats can lose fur for a variety of reasons, including disease or simply over grooming. However, if your cat has areas of fur loss, they should be looked at by a veterinarian, no matter what you may think the cause is. Ending3: Even if your cat has been unable to stimulate its immune system, it should still have hair loss. [substeps] Identify any areas of shedding at the time of your cat's fur loss. Ending4: [substeps] Check your cat's fur frequently when it is out of the cage. Early symptoms include loss of color, limp fur, dry patches of skin over the fur, and odd scratching.

Answer format: ending1/ending2/ending3/ending4