is it bad to use semi-permanent hair coloring and gel in your dog's hair, like the top of his head where he won't be able to lick himself? JUST CURIOUS!
okay, seriously, either you guys can't read, or you guys just can't read. who said i was going to try it on my dog?! because obviously, i didn't state it anywhere that i would. notice the captial letters at the end? "JUST CURIOUS". so don't get all mighty tough on me!

look up the recipe with food coloring and make it yourself.
don't buy hair dye!

"Don't test on animals" !! What a laugh. How do you figure the labs decided it was safe to put on our hair and skin in the first place.

Basically, while that answer made me laugh, I will say this:
WHAT THE HELL DO YOU WANT TO DYE AND GEL YOUR DOG FOR ??

You need to get out more. Or be kept in permanently. WTF??

Don't test on animals. They could be allergic to any foreign product and some of those chemicals could kill them.

Dont do it........ If you want ti color you dogs hair all you need is cool-aid mix and a bit of water it will not harm the dog in any way just be sure not to get it in the dogs eyes. Hope this helps