I got four chicks from the feed store the day they came in. Two EEs one australorp and a welsummer. One of the EEs has been sneezing for a few days sometimes there is a small amount of clear discharge otherwise no other symptoms. The others have started to sneeze a small amount also but not as much as the first chick. They are on medicated feed and water with vitamins and electrolytes. Right now their bedding is paper towels so there isn't dust being kicked up from pine shavings. Should I be medicating them for a respiratory infection and if so what should I use?