All of the Koran's 114 chapters except one begins with the phrase »Allah is merciful and compassionate«.
A Muslim is expected to recognize the brotherhood of man and should treat a non-Muslim as a brother. Showing compassion and charity, Muslims believe, is doing service to God. Therefore, it is written in the Koran »No man is a true believer unless he desires for his brother that which he desires for himself. God will not be affectionate to that man who is not affectionate to God's creatures. Assist any person oppressed whether he is Muslim or non-Muslim.«
Mohammed repeatedly forbade cruelty to animals, saying in the Hadith popular tradition, »Whoever is kind to the creatures of God is kind to himself.«