my dog has red spots all over his tongue?

My 3 year old male dog has red spots all over his tongue. What could it be? He eats a grain free dog food.

    my dog has red spots all over his tongue?

    My 3 year old male dog has red spots all over his tongue. What could it be? He eats a grain free dog food....
    General Dog Discussions : my dog has red spots all over his tongue?...