Are these pets? Did you buy them for food? I can't imagine you're out much money to even bother asking for it back. I mean, eggs are what? 25 cents. How much more are chicks? 2 bucks?
Not sure if these are the same prices as ordering in person. I only see quantities of 10 for sale, other than 40 for one option.
https://www.tractorsupply.com/tsc/catalog/chickens
I see them sold as either female or “unsexed”, meaning it’s likely random. And then there’s how they’re checked, which isn’t exactly a DNA test.
https://en.m.wikipedia.org/wiki/Chick_sexing
But here’s the standard disclaimer.
Guarantee of 90% accuracy on all sexed poultry.