Prophet Jonah claimed that the cows were part of the reason why the city of Nineveh was saved (Jonah 4:11). Krishna also descended, in part, to protect the cows of Vrindavana from the demonic king Kamsa who had taken to animal abuse. Please become a vegetarian, or at least diminish your intake of animal derived foods!
Killing a cow is like killing a man! - Isaiah 66:3