Even though it seems
@Chicken poppy has gotten the answers I just want to add a few things:
Purchasing a few Cornish Cross chicks for pets from the local farm store is such a small number is not going make one dent or smidgen of difference in the whole realm of "encouraging" the industry, but it would make all the difference in the world to those 2-3 chicks.
People everywhere are not good to their chickens. Even an ethical meat eater who properly takes care of the Cornish Cross can save them from a hell of a life that most experience. Ethical meat eater-meaning give the birds freedom to roam in a green pasture with trees, shrubs, places to dirt bathe, scraps from the garden. Also, ethically butcher which is a whole separate topic.
Growing too large: One way I've found for weight management is extra garden produce. If you have one specified area, like a compost pile, that you can throw all the overripe or extra goodies in. Chickens love to go through it all. Cornish especially since they love to eat. They will spend more time and exert more energy going through the goodies.
Hope all is going well with what you decided
@Chicken poppy.