@Britt10 I am so sorry keep A close eye on the rest. Add some good poultry vitamins to their drinking buckets for about a week just to boost immune system.
Welcome to BYC @Britt10
Best way to transport is in a large dog crate with towels on the bottom. I think a vet would be a good idea usually by the time we see symptoms they are feeling pretty bad so getting a vet to look him over is a good idea. Ask about a fecal to check for parasites...