If you used cow's milks yogurt as a fermentation starter, is soy yogurt vegan?!

Question: If you used cow's milks yogurt as a fermentation starter, is soy yogurt vegan!?
Answers:

You need to use active soy yogurt to start your fermentation!. This is like asking "is it ok to pick the meat off a pizza!."Www@FoodAQ@Com

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If you used cow's milks yogurt as a fermentation starter, is soy yogurt vegan?!

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