The makers say you can put some in their water dish.
It floats not mixes so a only a few drops in an open water dish is needed.
Like Vicks vapor rub it opens their breathing passages.
Do you have this on hand?
https://www.amazon.com/Goodwinol-Vetrx-Poultry-Remedy/dp/B07G4JXLMN/ref=sr_1_2?crid=3DHFXFV7FQ8BM&keywords=vet+rx+for+poultry&qid=1690848308&sprefix=vet+rx%2Caps%2C542&sr=8-2