I did the same thing last april, but now the demand isn't as high :/
You don't get the sheep 100% even though most of the times you do get one. You can only summon 1 per character every 12 hours and if you are lvl 10 or 11 a weapon of level 75+ should only hit 1s allowing the sheep to outheal your hits. Other than that its mainly a just summon and lure another monster to hit on kind of thing.