There has been rare instances that a chicken may lay in 12 hour intervals but its not common. Heres a link to some info regarding egg laying.Really? 25 hours? But I thought that some chickens lay twice a day...?
Yes hens can be aggressive just like roosters can be docile. It just all depends on the bird, how its socialize, and what it perceives as a threat.And is it normal for hens to be aggressive? Because before it started laying it would peck and bite and scratch people. Also, he/she is very friendly and loves to sit on people's shoulders when it's not attacking them.