nothing wrong with .png files, they use indexed colors just like .gif files. However, your'e wasting a LOT of shades on the cow without actually communicating much in the way of volume or real shape. Its horns look more like caterpillars than horns, and the eyes appear to be like glowing golden nuggets? The nostrils are superdark too, which is kind of weird. Also, just curious about even whats going on - two thick-handled, triangular knives + a cow = cheese? Very confused!