It can go by a couple of different names, Panacure, Baycox, but the active ingredient is Toltrazuril. It also comes in two different strengths, the 5% you have found and 2.5%. Preracehorse.com has smaller bottles, maybe four or six ounces, I don't remember for sure since I buy it by the liter...
Baytril is better than Tylan for infections like this. Chicks can have bacterial infections right out of the egg or picked up in the hatcher and in your case maybe from the poults. I am more inclined to think it was egg related. Cocci takes time to develop, it has to multiply the protozoa and...
There is no way a five day old chick is sick with cocci. If you are seeing runny poo sticking to its vent then it has a bacterial infection, probably one of the coli bacteria. Give it one drop of Baytril or Tylan 100 for five days in a row.
She is perfectly healthy, her only problem is the clogged nares. Spray with Vetricyn to soften and remove with a Q-Tip if you are so inclined. Be sure that your birds have deep water dishes to drink from, they will submerge their nares in water when they drink to help keep the nares clean and...
India Blue with no patterning is Wild Type. IB with the pattern added would be IBBS for Black Shoulder, IB Pied for Pied, IBSP for Silver Pied, etc. Not all splits to colors or patterns are visual but there are normally clues. I see no clues on your chick.
I can see no white on him to indicate any white genes, you would have to spread his wings for closer inspection. A Dark Pied doesn't have to have any white on them but you could tell from the parents if that was the case. He looks to be a typical Wild Type.
If you only turn one out at a time, 'they' won't all wander off. That doesn't mean you don't have to watch them, it takes a little effort to be a good steward.
We put ours on the ground by 12 weeks with no heat. They will be fine as long as they have a coop to go into at night. Leave a light on in the coop to draw them inside at night.
The season is basically over. Any eggs that are laid from now on out I will leave for the hens to set if they want. After two weeks I will toss the old eggs out or boil them for the chicks to eat.