I did not write the following, but thought it interesting:
The Church allows us to use animals for good purposes. We are not to misuse animals, or cause them unnecessary pain and discomfort, but they may be used for legitimate needs--food, clothing, they may be used for work, medical testing, education, etc.
The animal rights groups in England have succeeded in shutting down a place that bred guinea pigs. The man interviewed said the guinea pigs were used to study human respiratory diseases and now those tests are in jeopardy. Our society is full of people who deny the difference between human and animal.
The Catechism states in section 2417 and 2418:
"God entrusted the animals to the stewardship of those whom he created in his own image. Hence it is legitmate to use animals for food and clothing. They may be domesticated to help man in his work and leisure. Medical and scientific experimentation on animals is a morally acceptable practice if it remains within reasonable limits and contributes to caring for or saving human lives.
"It is contrary to human dignity to cause animals to suffer or die needlessly. It is likewise unworthy to spend money on them that should as a priority go to the relief of human misery. One can love animals, one should not direct to them the affection due only to persons."