You'll kill meat birds before 8 mos = they don't count. Just keep receipts. 8mos is "adult birds" which are the only ones that count by law. All meat birds are butchered before 8mos (CX chickens are processed from 3-12 weeks depending on how big you want them).
It's 12 birds total if you got them after 4/1/16. Not 12 hens and one rooster. If you have a roo and twelve hens, you have to give up a hen. Yes, he should be confined between dusk and down. They stipulate that "dawn" is roughly 7am (not sure, but I think you're not supposed to let them out before 7 and that he should be inside by 10pm).
According to the law:
1 Roo=one bird, but you're only allowed to have one
1 Hen= one hen
1 Quail= one hen
1 Bantam chicken = one hen
1 Duck = one hen
Total adult birds on premises not grandfathered in: 12 birds.
There is no stipulation concerning gender on ducks or quail. No matter how big or small your birds are, you are only allowed 12 adult birds on the premises. No stipulation concerns the type of quail or ducks which are owned, but if you want a native species (like bobwhites) you need a permit (through DNR, about $15/year).
No partridge, pheasants, peafowl, guineas, turkeys, emu, ostrich, etc. Just chickens, ducks and quail.