Since you got the eggs from me, I'll try to answer!!
I actually emailed Deb and asked her the exact questions. Here is her reply:
"When we hatch lavender chicks, some have chipmunk stripes, but that doesn't make them any less lavender than the chicks that are hatched with even lavender down color. As long as they come from a black base, they seem to have even coloring as adults. The only difference I have seen in the chicks without the stripes is they tend to have black combs and extremely black skin, otherwise - lavender is lavender. If you truly have and breed 2 black/lavender split birds - you will get 25% blacks that do not carry lavender at all, 50% blacks that are splits, and 25% lavender chicks. (Also you will have NO way to identify the blacks that are not splits compared to the blacks that are carrying lavender) That is the genetics. If you don't get some lavender from that breeding, then one or more of your birds isn't carrying lavender. If you breed splits to a lavender bird, your percentages will increase to 50% lavender and 50% splits."
In the pen that your eggs came from are the following: 4 black hens, at least 2 of which are split/lav (carrying one lavender gene); all of them could be split lavs but there is no way to know for sure; 4 splash hens (not carrying the lavender gene); 1 black split/lav male (black but carrying one lavender gene); one splash male (not carrying lav gene); one blue male (not carrying lav gene). Now that said, the busiest boy is the black/split lav
I have a rooster high rise condo and I rotate them in with the girls.
So the possibilities are many. Blacks, black/split lav, splash, blue, and perhaps a pure lavender. The pure lavender (see above) would be about 25% of the 2 black/split lav matings.
I think I feel another pen being built for just black/lav
I'm going to borrow a friends beautiful lav. male that she got from Bren last year!! That will increase our odds exponentially!!