Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to diagnose high thyroid levels in a cat [title] Determine the age of your cat. [step] Elevated thyroid levels in cats is most common as cats age. In fact, most cats who develop hyperthyroidism are over the age of 13.

Ending1: However, even kittens under the age of 11 do have high thyroid levels. This is the veterinary term for elevated thyroid levels, when the disease is present (often as an underlying cause of hyperthyroidism). Ending2: Only 5% of cats with hyperthyroidism are less than 10 years old. If your cat is over 10, it is more likely that symptoms may indicate hyperthyroidism than in younger cats. Ending3: The older the cat gets, the higher its thyroid hormone levels will rise. Your cat will likely slow down this rate with age. Ending4: In this age range, the disease will be hard to detect. Your vet may prescribe antibiotics to eliminate this disease.

Answer format: ending1/ending2/ending3/ending4