08:28:23 AM Feb 20th 2015
Another entry can be Hearthstone's Explosive Sheep, where Blizzard continue their theme. Card can be seen at: http://www.hearthpwn.com/cards/12180-explosive-sheep
01:39:26 PM May 5th 2014
I think the reason why Sheep are the most common exploding animal is because sheep are essentially living balls of fluffyness. And having something explode into feathery softness is...inherently funny.