1-9 birds for $10. Do you mean $10 each??? Can you share the place you use?I always just Dna sex my chicks. I have Silkies and found a lab that sexes 1 to9 birds for only ten dollars no tax. Its accurate and easy. Just pluck a couple chest feathers. That's it.then they test the Dna off the Feather. No more guessing!! That's one sure fire way to sex. Totally accurate and only takes a couple days once the feathers are recieved. takes away all the guess work. Its really convenient.