It's very exciting!
Fake eggs added into nest boxes are worth their cost! They show new hens that others deem this as a safe place to lay, take any curiosity peck while deterring accidental breakage... and even show my nest hiders that the nest isn't being raided daily so it's STILL okay to lay there instead of searching yet another place to hide a nest. It also deters egg thieve such as crows and rats if you ever face them.
Feeding layer at about 18 weeks won't "predispose" anyone to gout. Predisposal is genetic. While it's true that excess calcium fed to non layers (such as juveniles, broody, molting hens, and rooster) LONG term *can* cause kidney issues including gout and even failure... doesn't mean it will. I have seen an 8 year old rooster never fed anything but organic layer without issues. NOT my personal choice... but I work hard to put out information without any fear mongering added.
Your 17% feed is probably fine. If you like it and get good result... you don't need to stress about it.
Another sign they are getting close is they (some) will become very chatty... squawk awk awk. With all the things people mentioned, it good to note that EVERY bird is an individual. It's funny when they get startled and belt out their first egg song. Boy was I shocked when a cockerel belted out the egg song after getting startled! I love flocks with a variety of breeds.
Another good tid bit..
Hens are born with ALL the ovum they will EVER produce. Hens that lay earlier also lay smaller pullet sized eggs. The later hens lay larger eggs when they do start. So presuming no reproductive complications it may end up being a wash in the end. This HELPS me to be more patient.
This time of year birds tend to mature in a good amount of time. If they aren't hatched until June... seems like it can take forever waiting for fall/winter maturing... as laying hormone is light sensitive. The nice variety also offer a good spread in when they will molt and how long they spend and when they return... blah blah
ETA: Some also start layer when their
last hen laying puts out her first egg.
To be clear those are all confusing terms on feed bags. There are only a couple MAIN differences in all of them regardless of what they call it...
Protein and calcium content is your main concern and difference. After that they have slightly varying levels of vitamins, amino acids, fat, fiber, probiotoics and such. I like the flock raiser for the higher amino acids. Noting feathers are made form 90% protein AND it's amino acids.
Also.. calories or energy ONLY comes from 3 sources... protein, fat, and carbs including fiber. I get more bang for my buck using a "higher" protein feed... which usually cost more because protein cost more than oyster shell. I have zero issue with soft shelled eggs or health. All formulations are labeled for the correct age range (and species) and will meet the MINIMUM requirement
according to law. Any should be good for MOST birds. Some individuals may not thrive the same... doesn't mean bad feed but possibly bad genetics.