Sick Sheeps... with an s.
Since i'm not from an english speaking country, i didn't know that sheep in plural isn't spelled with an 's', at the end, until it was too late. Sorry.

You are a wolf, who has to make sure that all the sheeps in the paddock, stay healthy by eating the infected sheeps. The sheeps die of the viruses, or age.

Click on the sheeps to eat them, and gain points. Throughout the game different viruses will spawn and spread to other sheeps, and eventually the sheeps will die. You lose the game if there is too many sheeps in the paddock, or if there is no healthy sheeps left. Therefore you should eat the sheeps that spread the viruses.

There are 3 types of viruses:
Green: It spreads via body contact between the sheeps, and they will die 6 times faster than normal.
Red: When a sheep gets this virus, it will blow up and die after 5 seconds. Other sheeps in the radius of the explosion, will then get the same virus, so you better eat these sheeps, before everybody blows up!
Yellow: When a sheep becomes yellow, it will lay down some poop and die. If other sheeps step in the poop the same thing happens to them!

Tools that i've used:
Java
Eclipse
Paint.net

There is no installer when you download.