I also know someone, a hairdresser, who dyed her tiny poodle pink too. I wouldn't dye a yorkie but you always hear the term "pink poodle" ... I guess
Anyway, not sure what she used but she researched to make sure what she used was safe....would definately make sure you know it is not dangerous if licked and hopefully won't damage their hair....
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God Bless our troops

R.I.P. Sweet Lexxi Girl - you were taken too soon, we love you always
Vixxen ,
Truffles ,
Gemma Lexxi and their mommy Trina- Girls Rule!