Found this on Wikipedia....
"Broilers and
egg laying hens are the same species and share many characteristics, however, due to the rapid growth and selection for enlarged breast muscles, broilers are suceptible to different
welfare concerns, particularly skeletal." "Modern commercial broilers, for example,
Cornish crosses or
Cornish-Rocks, are specially bred for large scale, efficient meat production and although they are the same species, grow much faster than
egg laying hens or traditional dual purpose breeds."
Found this on Yahoo Answers...
Can broiler chickens lay eggs?
Yes, female broilers can and do lay eggs if they manage to live that long. However, most people don’t keep them till that age for several reasons.
1. They aren’t very profitable animals in egg production when it comes to food vs. feed ratio. In other words they eat so much that it isn’t affordable to keep them for egg production. Also, most broilers are crossed with Cornish which isn’t a very good egg production breed.
2. They don’t tend to live very long. And I don’t mean just because we kill them around six weeks. The broiler bird isn’t very healthy. How could they be putting on all that weight? Very often these bird’s organs, and legs will give out due to all the weight gained. They have a better chance of survival if put on a diet, but sometimes still have health issues.
Hope these help!