@Geckolady Here' another thread that is talking about purple comb's. According to what I seen, it could be from the cold, or maybe something internal.
https://www.backyardchickens.com/threads/rooster’s-head-has-turned-purple-from-cold.1502702/
https://www.backyardchickens.com/threads/rooster’s-head-has-turned-purple-from-cold.1502702/
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