Kathy, you are amazing. Thank you so much for the info!!!It won't hurt them. Did you say you have the liquid or the powder? If you have the liquid you can also give it as a drench. Dose to shoot for is undiluted Corid at 0.1ml per pound. You could try that for a couple of days and see if that helps.
Safeguard and Corid *can* be used together.
-Kathy