Having a rooster comes with its own set of problems. If it's not aggression then it's the crowing at 4 am. Aggression is worse if you have more than one rooster in the flock. Aggravated roosters may also turn their aggression on your hens on yourself if they cannot get rid of the frustration. The solution to your rooster problem will also differ due to the rooster’s age, breed, and your rooster to hen ratio. Fighting between male birds is intense and often fatal. If you don’t have enough hens, don’t keep roosters together. Their aggressive behavior is also amplified by the start of the mating season in spring. Heavy breed roosters, like Orpingtons and Barred Plymouth rocks, usually do well managing 8 to 10 hens where a lighter breed, like the leghorn, copes really well with 10 to 15 hens. If you have less than 5 hens per rooster, you should reconsider since your roosters might start fighting over who gets to mate with the hens. The alternative is also true, if you have too many hens for one rooster, your rooster will become henpecked, lose weight and condition and suffer from lowered fertility. Henpecked simply means he’s trying to mate too often, unable to keep up with the demand and thus cannot produce enough sperm and has no time for eating which is, all in all, a very bad thing. There are three things to consider if your eggs continue to be duds. The first is to make sure your rooster is getting enough water. A rooster deprived of water for more than 248 hours will have lowered fertility. The second thing is to consider his iodine intake. If he had access to any foods containing iodine salt, you might want to remove this feed or replace it completely to avoid lowered fertility in your rooster. The last thing is to watch what you feed your flock. If a rooster eats any moldy foods he is sure to show a reduced sperm count and this struggle to fertilize your hens. The next thing you’ll have to worry about is a broody hen.