The 5 older birds most likely have a respiratory disease introduced by the 2 younger birds that were carriers. You shouldve quarantined the 2 birds for at least 30 days.
The vents and feathers need to be cleansed on your older birds so you can identify whether it's poop, dirt or mites. The 2 new pullets that are listless and have bloody diarrhea sounds like cocci and need to be dosed with corid 9.6% oral solution. It can be found in the cattle section at your feed store, or try ordering it online.
As for the respiratory disease, there's no telling which one it is, maybe MG. Here's a link to poultry respiratory diseases:
http://edis.ifas.ufl.edu/ps044
I recommend treating respiratory disease with denegard. It can be purchased online from QC Supply or call them. Good luck.
The vents and feathers need to be cleansed on your older birds so you can identify whether it's poop, dirt or mites. The 2 new pullets that are listless and have bloody diarrhea sounds like cocci and need to be dosed with corid 9.6% oral solution. It can be found in the cattle section at your feed store, or try ordering it online.
As for the respiratory disease, there's no telling which one it is, maybe MG. Here's a link to poultry respiratory diseases:
http://edis.ifas.ufl.edu/ps044
I recommend treating respiratory disease with denegard. It can be purchased online from QC Supply or call them. Good luck.