So last Saturday went to a chicken swap and pick up 4 babies 2 are 3 months and 2 are 2.5 months. The 2.5 month olds are vaccinated but not the 3 month olds. Housed in quarintine together from the rest of my flock but my flock can see them. Well yesterday I thought i saw blood in the poop of one of the babies but not sure so blew it off. Today one of the babies (not sure which one) definitely has diarrhea and streaks of blood. Also noticed the 3 month olds have mite. Help what do I do? Do I need to treat all my chickens or just the babies? Omg flipping out here!