Animals
Do animals matter to God?
Animals are God's creatures. He surrounds them with his providential care. By their mere existence they bless him and give him glory. Cf. Mt 6:26; Dan 3:79-81. Thus men owe them kindness. We should recall the gentleness with which saints like St. Francis of Assisi or St. Philip Neri treated animals.
God entrusted animals to the stewardship of those whom he created in his own image. Cf. Gen 2:19-20; 9:1-4. Hence it is legitimate 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.
The hierarchy of creatures is expressed by the order of the "six days", from the less perfect to the more perfect. God loves all his creatures Cf. Ps 145:9. and takes care of each one, even the sparrow. Nevertheless, Jesus said: "You are of more value than many sparrows", or again: "of how much more value is a man than a sheep!" Lk 12:6-7; Mt 12:12.
In God's plan man and woman have the vocation of "subduing" the earth Gen 1:28. as stewards of God. This sovereignty is not to be an arbitrary and destructive domination. God calls man and woman, made in the image of the Creator "who loves everything that exists", Wis 11:24. to share in his providence toward other creatures; hence their responsibility for the world God has entrusted to them.