The different brands of feed often look a lot different. Yours are fine on the medicated starter mash. It is what I would choose if I could. Around here I can only get what they call medicated starter/grower, one product that people use til they start laying. So I feed that. I could go to
TSC and get separate formulations for starter and grower, but
TSC's is not medicated, and I want the med til they are old enough to have some immunity to cocci.
Some people stay with grower even after laying begins, but add free choice calcium, usually in the form of oyster shell. Layer has too much calcium for babies, so if you have a broody raising chicks, this is the easy way to go, as the chicks won't really get into calcium (oyster shell) they don't need, and grower is fine for chicks as well as laying or broody hens if the hens also have a source of calcium available.
I use scratch as one of the treats for my hens, and just started using it for my 8 week olds, along with free choice grit. My reading indicates it is not all that nutritious, although it provides some extra energy for them to stay warm in cold months. They do love it. I give treats for both groups, but in small quantities, mostly so they will come when I call them. All also have access to grass, weeds and bugs.