The eyes appear shepherd. If those are gray/blue/black marks on the tongue, it can be an indication of chow chow.
Not all chow mixes have black tongues or spots. It doesn't indicate they have chow in them.. My friend's golden retriever has a spot on his tongue and he's purebred. My Rottweiler mix, Jenny (RIP) had a spot on her tongue and was no way a chow.
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