I keep having this notification. I checked Zoopedia, and it is not obvious where I can find this information (where to find Male to Female ratio). Am I missing something?
Unless you are talking about some form of inconsistency between the Zoopedia and in-game mechanics, the information is under the Species Data tab in the Zoopedia.
When the ratio is 1 male on 3 females, and you have 1 male on 4 females, that is incorrect sex ratio. I think the zoopedia is not very clear on these things, but this is what I understand.