After another session of examining mouse bottoms, I've sorted out four boys and three girls. A nice balance of gender seeing that ultimately I have five females and four males. I haven't mentioned this yet, but the mini mice are an interesting mix of colors. Three have similar markings as their birth mom (black with white markings), two are dove grey with white markings, one is pure white, and one has a light grey satin shiny coat, very pretty almost silver looking. Care to guess which one is my favorite? :)