My drawing abilities are limited to stick figures. So here are some basic skins for Minecraft.
You'll likely need to open and read *.jar files. If you can't, try downloading and installing http://www.7-zip.org/.
00001 - PUG!
Replace the oinky pig with an oinky pug. No longer will you cut up oinky for meat. Unless you are an evil bastard.
Find your minecraft.jar file and insert this into the \mob subfolder, replacing the old pig.png file