Make sure the chicks are both drinking enough water and eating. The one gasping looks like she has some mucus that is draining from her sinuses, and making her swallow at times. Getting started chicks from another person is risky. We can never know if they have been exposed to a carrier. The stress of moving and the cold could have brought on symptoms. If I could get some Tylan 50 injectable at a feed store, I would give it orally 1/4 ml per pound 3 times a day for 5 days. Tylosin powder for the water or oxytetracycline would also work. Oxy is sometimes available in feed stores as LA200 injectable. If you have a vet who could prescribe that would be best. Testing is needed to determine if they have a respiratory disease such as MG or others. Hopefully both will make it. Keep them warm, since having a respiratory infection can make it hard to regulate body temp.