I understand you want to pull a prank on a friend, but it really wouldn't be a good idea. The others are right in saying that it may not grow back as long and can a long time to grow in...especially for a long coat. Heck, it takes them a couple of years just to get their full adult coat in. And though I'm sure the regrowth would be quicker, your friend waited all that time. Not cool to mess with it.
It's like egging a car. Yeah, it seems harmless...until the enyzmes in the egg starts eating away at the paint job. Regardless of intent, a mess up is a mess up.
If you want to pull a semi-harmless prank (and the dog doesn't mind having its foot handled) you could paint their toenails pink. They make dog toenail polish now, and the groomer I use to go to did it for her clients. Or take him to a groomer and get him groomed and fluffed up with pink hairbows and a little shirt that says "Princess." Doesn't harm the dog, will probably get a rise out of your friend, and keeps you away from the kool-aid.
But be warned, people are finicky about their dogs...just like their kids. I would think it was funny if a friend of mine painted Boo's nails or got him a cute hairbow. However, it would be on if I came home and found him dyed or shaved. For some, even the painted nails might be overboard.
That stuff (kool-aid/food coloring) may never come out, depending on what color their coat is btw.
Last edited by unchienne; 08-25-2009 at 08:58 PM.