I have five chicks that will be shipped to me next week. They will be a day-old when I get them. The feed store down the road from me has some new chicks of a different breed that I wanted that weren't available to ship to me. Would it be wise to get some of those chicks and mingle them with the day-olds that will be delivered next week or would this be a really bad idea? This is also my first time with chicken math! Oh gosh.