Really struggling with sexing my 4 quail. They are not ones that can be determined by color. One for sure is male, it is mounting everyone and crowing. Two of the other ones are crowing as well. Only one is not crowing so hoping it’s a female. The venting has not been going well. I guess I didn’t hold them enough as chicks because they are not having it. Thought I got foam from one but it wasn’t the white I’ve seen, it was more grayish. One of them seemed to have a bump under the vent. I thought the crowing was a sure sign but I’ve read some people have crowing females. Help!?