The article "The Thinning Ranks of the Thick Skinned," Oct. 25, presents only part of the story of this vanishing treasure.Omitted is the great injustice meted out to wild animals in captivity. Many people view animals as ours to use and destroy. Captive animals suffer severely - especially when chained by the feet as shown in the photo. Suzanne J. Bradley, New York Letters are welcome. Only a selection can be published, subject to condensation, and none acknowledged. Please address them to "Readers Write," One Norway St., Boston, MA 02115.