First timers with all those newbie ??s

Welcome spock78! Dirt floors are fine. A pullet is a hen under one year of age. Some breeds start laying earlier than others,usually  around about 18 to 24 weeks. You can keep different breeds together without problems. If you want fertilized eggs you have to have a rooster, and a hen can keep producing fertilized eggs for 3 weeks after the rooster is taken away. That's all I can answer for you, hope you have fun with this site!

Welcome Spock and the Mrs.  the only answers I can give you is to get a copy of Storey's Guide to Raising Chickens.  Believe me it will help a lot then keep reading here and don't forget to use your good common sense.  We are so pleased to have you. 
http://www.backyardchickens.com/web/viewblog.php?id=1280

Welcome Spock,  I agree dirt floors are ok and in some cases better, but you need to protect the perimeter from predators, the digging type.  Many people just run 1" of chicken wire around the building and run several inches up the wall in order to prevent digging.  You can cover it with dirt.  I use tent stakes to secure the wire.  Grass grow here so it is covered in grass in a few weeks. 

I think Big W answered most of your questions.  As to the chicken and egg conundrum, I believe the controversy still rages on. 

Have fun with your new birds and join us often.

Hi! Yet another addict! Cool!

My dh is retired so I know what you mean about a tired brain. So, with that in mind, ,

#1 my calculator tells me you have roughly 180 sq ft in your coop. At 3 sq ft per bird (living in NM I figured they'd be outside most of the time and so could get by on less than the standard 4 sq ft per bird) I figure that comes to 60 birds you could put in that building. If you make a nesting unit which holds about 1 nest per every 4 birds and mount it a couple of feet off the floor on the wall that will give you all the space on the floor for the birds. If you mount roosts at one end and food at the other end you shouldn't have much pooping on each other going on because when they aren't roosting they will be eating/nesting/outside.

#2. I've never raised broilers but I imagine you would need to keep them separate as they have different feed requirements than layer chicks.

#3. Most pullets (girls under 1 year of age) begin to lay around 5 or 6 months depending on breed. Some breeds develop more slowly and so lay at a later date.

#4. You don't need a rooster for the hens to lay eggs, but you do need one if you want the eggs to be fertile for hatching.

#5. A dirt floor should be fine. The key is that it must be kept dry and preditor proof.

#6. The chicken came first. God created all animals as adults and told them to multiply and fill the earth. Besides, if the egg came first there would have been no one to sit on it and it would have gotten cold and died.

I'm new to the chicken addiction too so I'll leave the info to what you have gotten above and what will follow......

But I can say welcome to the forum....this is a good bunch and I'm sure you'll fit right in.....

Dennis

If you want a naughty answer to this question, check out the Social Section, a threaed called "uh-oh..it's a really funny DIRTY chicken joke."

Welcome!

It looks like your questions have all been answered, but I just have to voice my opinion on the space of your coop.

You didn't say if you were going to have a run for them to be outside when they get a little bigger or not. You may intend on letting them free range outside when grown, I don't know.  Anyway, my opinion on space is the bigger the better, but in an enclosed coop & run, I believe that at least 9 square feet per bird is best. That way, they are not too crowded, & feather picking should be at a minimum or non-existent.
If they will be let out to run loose when they get feathered out, then the 4 square feet per bird in the coop is fine.

I know that everyone has their own ideas & opinions, and this is mine. I hope it helps.

Jean

Well, I didn't get to answer any of your questions, but..Welcome and "Live long and Feather".