I have a 6 month old starlight chicken who has been mouth breathing and stretching her neck for about 2 days. It is impossible to find a vet that will see her, sadly. Can I give her my sons oral amoxicillin-clavulanate 600 mg/42.9 mg per 5 ml for a possible upper respiratory infection? I also dewormed her in case it is the rare gape worm infection. I hate to lose her without trying