Thanks for all your great input!
I can't have roosters where I live so I was a litter concerned about my dad's comment, but I guess I don't really have to worry. It's also good to know I might be overthinking the even/odd thing. I had five chickens but when one turned out to be a boy, I had to swap him out with a friend for some chicks. I ended up getting three chicks because I didn't want to raise one alone and two would make an odd number. Now I have seven chickens--more than I had planned!