[WIP's] Three Crazy Cows + avatar

[madf]

Greetings, I am making a game for a cellphone, and here some of the character sprites.

Green- and bluecow 16x16, and the red one is 24x24. (the red is also the one in my avatar.)
Colors are 8-bit restrictional, so I don't have to be too thrifty...

Green


Blue


Red


I'm satisfied with the result, but I believe there's always something too improve. So CC away.
  thx

EDIT: Oh, and I don't mind if you comment my avatar aswell.

[AlexHW]

the blue and red ones dont read as well as the green one at original size due to the lack of contrast between the outline and the filler colors, hence you cant really see their form that well.
upping the contrast between the outline and filler colors may help bring the readability up.