For laying hens there are two kinds of hybrids we typically get from hatcheries in the USA. One is the commercial hybrids, those specifically bred to produce a lot of Grade A Large eggs with a good feed to egg conversion ratio. These hens are generally small bodied so they don't need to use as much food to maintain a larger body. These are not bred for longevity. They typically lay very well for two seasons but after the second laying season their egg production drops off enough that it is more economical to get a new batch of pullets than feed them through another molt.
These commercial hybrids are fine tuned to lay a lot of fairly large eggs if fed and managed a certain way. They are typically fed around a 16% protein feed, any more and the eggs get even bigger. They are prone to health problems anyway since they are so fine tuned but the larger than normal eggs can lead to even more health problems like prolapse, egg bound, and internal laying. It's sort of like the Cornish X meat birds that are so fine tuned to put on weight that they often develop health problems as they age. The hybrid layers are also specialists.
The other type of hybrid are crosses of dual purpose birds. To make a black sex link they often use a RIR or New Hampshire rooster over a Barred Rock hen. To make a red sex link they often use the same roosters over White Rock, Delaware, Rhode Island White, or Silver Laced Wyandotte hens. I'm sure there are other combinations used. These hybrids inherit the traits of their parents, will lay like their parents, and are just not as fine tuned as the commercial hybrids. These dual purpose hybrids are not as susceptible to prolapse, egg bound, or internal laying as their commercial cousin and tend to live longer.
Some of the names used to market these hybrids are marketing names, they don't tell me which type of hybrid they are. If you know which hatchery they came from and tell us we can probably figure it out. They might actually tell you if you go to their website but the expected weight of the adults is a huge clue.
These commercial hybrids are fine tuned to lay a lot of fairly large eggs if fed and managed a certain way. They are typically fed around a 16% protein feed, any more and the eggs get even bigger. They are prone to health problems anyway since they are so fine tuned but the larger than normal eggs can lead to even more health problems like prolapse, egg bound, and internal laying. It's sort of like the Cornish X meat birds that are so fine tuned to put on weight that they often develop health problems as they age. The hybrid layers are also specialists.
The other type of hybrid are crosses of dual purpose birds. To make a black sex link they often use a RIR or New Hampshire rooster over a Barred Rock hen. To make a red sex link they often use the same roosters over White Rock, Delaware, Rhode Island White, or Silver Laced Wyandotte hens. I'm sure there are other combinations used. These hybrids inherit the traits of their parents, will lay like their parents, and are just not as fine tuned as the commercial hybrids. These dual purpose hybrids are not as susceptible to prolapse, egg bound, or internal laying as their commercial cousin and tend to live longer.
Some of the names used to market these hybrids are marketing names, they don't tell me which type of hybrid they are. If you know which hatchery they came from and tell us we can probably figure it out. They might actually tell you if you go to their website but the expected weight of the adults is a huge clue.