Answer by Suminda Sirinath S. Dharmasena for Killing a bigger animal causes more bad karma than killing a smaller animal?

The intensity of Karma in killing of a being including an animal can be influenced by these 2 factors:

• intensity of volition - more planning or effort the worse (elephant vs ant), more stronger your desire to kill the worst
• conciseness of the being - if the being has a higher level of conciseness (elephant vs ant) and virtue (bear vs cow) the worst

from http://ift.tt/1PSUzuh - User Suminda Sirinath S. Dharmasena - Buddhism Stack Exchange (http://ift.tt/1NMLzIc) by Suminda Sirinath S. Dharmasena (http://ift.tt/1ZwZIP2)