It's been really warm down where she lives too so I agree, they probably don't need any heat lamps and that might be why they are panting. They are all inside too if I'm understanding right which is all the more reason not to worry about them getting cold. They've got the down coats on plus if they do get a chill they can huddle together for warmth. I'd be surprised if that happens though.Nope you didn’t much! Okay so maybe they are a little cramped and since they are wearing a down jacket they are getting too warm. I have read often of Pekin duckling panting and needing their heat lamp removed at around 3 weeks old. They sure looked healthy the pics of the ones you posted. Hopefully the move will help. I don’t know what else other than space and not using the heat you can do for them unless it’s warm enough outside to move them out.