Killing an ill animal to relieve it

A: If you slaughter the sick animal to eat from its meat, there is no harm in that. But to slaughter it just to take it out of its misery is not permissible. These animals are property and slaughtering it is considered wasting of such property, as Islamic Shari`ah forbids wasting money. May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.