@Molpet
Congrats on the cuteness!
My guess is the black chicks are likely Dinner's. Lav orps are actually black orps with a double dose of the recessive lav gene - which dilutes the black to make it look lavender. Dinner has 2 lav genes - so he looks lav & passes on his lav genes. However, unless the biological mama also gives a lav gene, the babies will look black. I doubt you'd get any lavs this year.... but all of his offspring will carry the lav gene, so likely you'll hatch some lavs in the next generation.
DD's silkie's going broody for the 3RD time & PR is joining her for a 2nd time this summer. I gave them some eggs.... but the big incubator is packed away and I'm hoping it stays that way. The Hovabater has some quail eggs due to hatch next week, then that will also get packed away. Many of our quail will be 2 yrs old this fall, so they will be retired. I plan to sell all (or most) of what hatches. I may be talked into keeping 6 young quail over the winter, to get us started again in spring..... But it's also easy to buy eggs from someone else.