I was reading up on cocci...I found bloody poop in my 3 and 5 week chicks brooder. I started them on 9.6% corid solution in water. I read that a lot of times chickens with cocci will also develop respiratory issues and to treat with antibiotics as well. My chicks are sneezing, I have Denagard. Should I be treating with that as well? I thought I read somewhere not to put anything else in water with corid.