I will never understand why when people post that they couldn't kill an animal on their property, people who don't think twice about it come out of the woodwork to chastise them.
We have relocated Raccons - once a mother with 4 babies. They didn't return. I could never kill an animal for being an animal.
It's my job to build the chicken coop as secure as possible for my girls.
I have 3 chickens. We raised them from day olds. The first month we had them we handled them all the time and they were very tame and would sleep in our laps in front of tv etc. At 2 months old they went outside. Then they got a little wild, a little standoffish.
But always came running for...
I have no experience in this area, but my comment would be, if you do not want your children to get attached, then I would get 30 not 3. If there are only 3 their separate personalities would stand out and they will likely get named.