Alright so I got 4 new pullets yesterday, they are about 8 weeks old or so, no obvious health concerns, but I was still planning on keeping them far away from my current flock of to 12 week old pullets. I was keeping the new girls in a brooder tub in my living room, and the older girls are free ranging in the backyard. Well this morning I run inside to go to the bathroom, and I don't shut the back door behind myself. Why would I? The dog is on a car ride, cat is locked up, everybody is seperated... I come out from the bathroom and BOTH Joon and Munk (12 week olds) are in my living room!! And NOT only that, my NEW pullets somehow pushed their cardboard 'opening' (which was set shut but not tied, these are youngin's, didn't think they could escape!!) and now ALL my chickens are exploring the living room, pooping wherever, and not only that the NEW and OLD are together! AUGH! I was really going to myself.. I rushed around, gathering Munk and Joon and tossing (not literally but close) them outside, SHUT the back door and got the new girls back in their brooder. So.. Everybody was exposed to everybody for however long I was in the bathroom.. Now I have only had these new girls 12/18 hours, and was planning on keeping them all seperate for 14-30 days depending on how everything went. But now they have seen each other, met, mingled, and I am worried for my current flock of two. How many people have had issues with new vs old chicks and illness?? How concerned should I be? Should I just put them together now that they have already been exposed to each other? Any information would be helpful.. I feel so stupid but had NO clue Joon and Munk would come IN the house! They never ever have before.. UGH. I feel sick to my stomach about it, it was such a stupid mistake, and I hadn't planned on something like this happening at all. I have not read any horror stories as of yet, but I will be doing a search. If the chicks do not appear sick after 30 days and you integrate them, could something happen then? Now I am thinking I should NOT have got new chicks at ALL.. I should have just stuck with my two and not expanded. I feel awful for putting any of them in danger and hadn't intended on doing so. Why do people get new chicks if it is so dangerous?? Man I think I am gunna go throw up now. Edited: I did a search for failed quarantine's, and a few words mixed up to try and get better results. I couldn't find anything about bad quarantine happenings, at least in the search I did on BYC. I am NOT saying they don't exist, merely that I could not locate any threads that might be of help. I am aware this did not go as smoothly as I had hoped, but if anybody could offer some suggestions on what to do now I would be grateful. Do I need to do anything special to my older two girls? Do I need to do anything special to the new girls? Nobody outwardly appears sick, everybody eating, drinking, pooping like normal. am aware I messed up, believe me, I am beating the crap out of myself for it.. Adding: 1) What type of bird , age and weight. The new birds are Wyandottes, and the current flock is 1 Barred Rock and 1 EE 2) What is the behavior, exactly. Everybody appears happy and healthy 3) How long has the bird been exhibiting symptoms? No symptoms at the moment 4) Is there any bleeding, injury, broken bones or other sign of trauma. No 5) What happened, if anything that you know of, that may have caused the situation. New birds mingled with current birds 6) What has the bird been eating and drinking, if at all. All are on water and grower, seperate waterers and feeders 7) How does the poop look? Normal? Bloody? Runny? etc. Completely normal, mostly formed 8) What has been the treatment you have administered so far? Nothing yet 9 ) What is your intent as far as treatment? For example, do you want to treat completely yourself, or do you need help in stabilizing the bird til you can get to a vet? Treat myself 10) If you have a picture of the wound or condition, please post it. It may help. No wound 11) Describe the housing/bedding in use Pine shavings, the new pullets were in a brooder and the current 12 week old pullets came inside and they all were in the living room together. Able to touch each other and mingle. I just got new chicks yesterday. This is a quarantine mishap.