I found this on-line - but it seems as though you have the basics covered
How to Identify a Healthy Chick
Healthy chicks are active, but not too noisy. Of course, they do sleep more than adults, like all baby animals, but if disturbed, they quickly get up and move away.
If you look at a content group of chicks in a proper brooder, some will be under the heat lamp or near it sleeping peacefully, while others will be eating or drinking or walking around. They will be quiet except for an occasional peep.
Baby chicks should have two bright, clear eyes, and their rear ends, or vent area, should be clean. Their beaks should be straight. Some hatcheries trim the end of the beak to prevent chicks from picking at each other, so dont be alarmed if the beak tip is missing. Their toes should be straight.
How to Identify an Unhealthy Chick
Never take a chick with cloudy or dull eyes, a twisted beak, bent or missing toes, or a dirty vent area.
Chicks that are very noisy are unhappy and stressed, either from being cold or hungry and thirsty. When they arrive in a shipping box, the stress is evident from the shrill cheeps. But if you place them in the right temperature with food and water, they should quickly calm down.
A droopy-looking chick may not be healthy. If a chick is touched and it responds very little, it probably isnt healthy. If its lying on its back with its legs in the air, its definitely unhealthy!
Chicks that are panting, with their beaks open, are either too warm or sick. If they appear normal after being cooled down, they should be fine. If the chicks are as far from the heat source as possible, its probably too hot. If theyre piled on each other near the heat source and peeping loudly, its probably too cold.
If chicks are very noisy but they arent obviously hot or cold and food and water are available, something else is wrong. While you can fix the temperature or hunger problem, avoid purchasing chicks if you cant tell what is wrong.
The belly area should not look sore and red. The chicks shouldnt have any wounds or bloody areas. (Newly hatched chicks will have a slight lump on the belly where the egg yolk was, and thats okay.)
Read more:
http://www.dummies.com/how-to/conte...hicks-for-raising-chickens.html#ixzz1HY73ti2h