Stree, I think you probably would have received more answers about your chickens if you had phrased your question in a different way... say "I'be just bought some month old and some 10 day old Orpingtons, Sussex and Faverolles - has anyone had experience with them, and give me some tips please?"
I would still have responded with the fact that the month olds and 10 day olds need to have two different temperatures
I'm guessing that your Orps and Faverolles are exhibition stock, if the breeder regularly show and wins with his birds. Here are my tips on raising exhibtion stock...
1) If you intend to show, once the chicks are 8 weeks old, put them on a grower pellet, and keep them on growers until maturity when you can switch them to a breeder pellet. With exhibition birds, especially females, you need them to keep conditioning up, putting on mass, and producing the wealth of feather that (especially the orpingtons) heavy soft feather breeds are noted for. This means that you preferably don't want the pullets laying this year
2) Faverolles have a fifth toe (which I'm sure you have noticed
) keep an eye on the fifth toe nail, to make sure it doesn't grow too long, or curl over to cut into the leg.
Lacing in orpingtons isn't in the breed standard yet, so expect a bit of irregularity / non-homogenity in the quality of the lacing.
Chocolate isn't in the bred standard - at least for the LF - so your birds may not grow to have the same mass or floof as, say a buff.
Exhibition orpingotns are fairly notorious for being poor layers, both in number and in the size of the egg compared to the bird - expect about 120- 180 eggs per year.
Large breeds such as the Orpington and Faverolles may need to have a few modifications to the coop... such as, having the roosting bars a bit nearer the ground, having a larger pop hole, if you have a raised coop, then it shouldn't be any higher than about 18" off the ground (jumping from a height can seriously damage a heavy breeds legs/joints - especially in mature birds.) Also, they may need a bit more space than the 12" of roosting space normally mentioned.
I love the large breeds, though exhibition lines are usually more garden ornaments than egg layers, and currently have 4 brahmas just two weeks old myself - after my three exhibition girls were taken.