I'm picking up six 2yo Jersey Giant hens this weekend from someone local who is just looking to downsize their flock and selling a bunch of hens for cheap. I'm really looking forward to the larger eggs I currently have 2 Ameracaunas, 2 RIRs (one is a rooster, he's top of the pecking order), a Barred Rock, and a White Cochin rooster, all about 8 months old and raised together. Mine all get along fairly well, with the occasional peck between hens at breakfast time. I did read the article on here about introducing new members to the flock... Once quarantine is over, I plan to keep the new birds separated in a pen for a while, and rotating the free ranging as suggested, so they'll meet through the fence before actually being around each other. What I'm wondering is how I should expect the Jersey's to behave with the other chickens. I've read that they're a docile breed, but I know they'll be bigger (and older), so I'm wondering if there are any special precautions I should take? After the meeting through the fence phase, I figured I'd just allow them to free range together so nobody get stuck in a corner or anything. Should I introduce all of the new birds at once and get it over with, or like two at a time? I'm picking them up on Saturday. Friday is my prep day, so I'm planning out exactly how I want to do things initially, then of course I'll have some time before they're actually introduced to my flock. But if anyone has any super tips about the initial set up as well, I'll take 'em! I know all about bio security, having actually worked in a lab environment and having to follow strict quarantine protocols. Also, I read the bit about giving the new birds probiotics and such. Can anyone recommend any type in particular? Any harm in giving to my existing flock as well?