Thats absolutly ridiculous! Do you get more color when you drink koolaid?
Also, if you used sweetened koolaid it could even be dangerous.
BUT.... Staining the outsides of them, theur scales and such with koolaid, food coloring, or other substances is not unheard of. It is a sad thing, and very rarely happes but ut does. Usually people just change the colors using a photo editor.
Also, many of those AWFUL reptile sands that are colored will stain a dragons bellies and feet. You will often see that with the petco/petsmart dragons. Their feet will be bright purple or orange from calcisand.

Kakadu Dragons!!
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