I went outside this morning and found one of my hens standing in the middle of the yard. When I went up to her she started crowing! I have had roosters before about a year ago and know that my hen sounded just like the rooster. She hasn't stopped crowing for about an hour now, it's off and on but she is crowing. I also know the hen is not a rooster because she has layed eggs for a year and a half now, and one today. Is there something wrong with her or it that just something that a hen can do as well?