It sounds like the beginning of a bad joke; how do you treat an anorexic chicken?
But actually it is a medical condition and Dr. Susan O'Brien, owner of Colorado On-Site Veterinary Services, has a cure not a punchline: acupuncture.
The good doctor is based in Gypsum but travels the Interstate 70 corridor mostly from Avon to Gypsum and treats all creatures great and small from hedgehogs to horses and, of course, anorexic chickens.