One who is in Krishna consciousness understands that there is no difference between the animals and the innocent children in one’s home. Even in ordinary life, it is our practical experience that a household dog or cat is regarded on the same level as one’s children, without any envy. Like children, the unintelligent animals are also sons of the Supreme Personality of Godhead, and therefore a Krishna conscious person, even though a householder, should not discriminate between children and poor animals. Unfortunately, modern society has devised many means for killing animals in different forms of life. For example, in the agricultural fields there may be many mice, flies and other creatures that disturb production, and sometimes they are killed by pesticides, however, such killing is forbidden. Every living entity should be nourished by the food given by the Supreme Personality of Godhead. Human society should not consider itself the only enjoyer of all the properties of God; rather, men should understand that all the other animals also have a claim to God’s property.
Source: A.C. Bhaktivedanta Swami Prabhupada (2014 edition), “Srimad Bhagavatam”, Seventh Canto, Chapter 14 – Text 09