Silberman, M. S. 1988. Editorial - Animal welfare, animal right: The past, the present, and the 21st century. Journal of Zoo Animal Medicine 19, 161-167.

Humane interest groups concern themselves with quality of life . ... They favor excellent treatment of animals, the cessation of what they deem needless animal use, and they want the research community to strive for alternative methodology and a reduction in animal numbers [p. 161]. This [Animal Welfare] Act has not been enforceable at times and incursions go unpunished because of loopholes and the vast area covered [p. 165]. The real question that faces us today is, do we need more laws, or do we need to enforce the existing regulations honestly and with vigor? In my opinion, an attempt at the latter should be our first step, for I believe that with conscientious effort the existing statutes will provide the protection the overwhelming majority of people want [p. 166].