Yesterday afternoon someone brought us some standard size (well, to US they look like GIANTS!) light Brahmas, 4 hens and 1 rooster. (This rooster proudly stands 2 1/2 feet at full height.) All 5 of these including the rooster are VERY docile and don't mind being picked up in the least. In the middle of the night, my son also brought back some hens and a rooster from another area in Alaska, while picking up some sheep. Here are the type of chickens and sizes: We started out with 2 RIR/Aracaunas, 2 banty brahmas, 1 silkie, 1 english game hen, and 2 polish hens. Then came the light Brahmas yesterday, and now 5 month old: 2 Cuckoo Marans (one being a rooster), 3 black sex links, and 2 gold sexlinks. My question is: Because we have such a variety in sizes, will it be harmful for the light brahma rooster and perhaps the cuckoo Marans rooster when full grown (I have NO IDEA how big he will be when full grown) to mate the smaller chickens, and will they even try. We don't plan at this point to hatch any eggs, we are just SO thankful to have them for the eggs. At some point, we will definitely want to hatch some, but not until we have a separate area to do so.