They've been bred specifically for the single task of balancing human society.
Rodents have been specifically bred for exercise behavior or performance in several different studies.
Horse and dog were also consumed, but probably not specifically bred for that purpose.
Hinks wanted his dogs white, and bred specifically for this.
Most dogs are bred specifically for this purpose, by companies such as Harlan.
Unlike people, race horses are specifically bred and reared to run.
It's much easier to make weapons from plutonium bred specifically for that purpose.
Any goat can grow cashmere, but these are bred specifically to produce it.
It is the only breed known to have been specifically bred for hunting large felines.
Many breeds have been bred specifically for the strength, attitude, and physical features that would make them better fighting dogs.