Help! First time duck mom! Rescued pekin ducklings

[Miss Lydia]

Honestly I doubt very seriously they will be cold at 4 weeks they are pretty big by now an should be feathering in pretty good?

 

[Brooke17]

They are atill yellow only feathers that are starting to come in is in the tail

 

[Brooke17]

Dont have good photo quality

 

[Miss Lydia]

Are you sure they aren’t 3 weeks? They are precious!

 

[Brooke17]

They were 3 weeks ago as of tomorrow

 

[Brooke17]

Unless i wrote the wrong date.. idk ima keep the light on a few more days to see if anything changes i have one duck sneezing now and one keeps breathing with mouth open been trying to keep them dry well fed and happy..

 

[Brooke17]

One of the ducks is sneezing and they both are panting is this normal.. sorry just worried i have the ac going in my room its about 65 70 at most they have been drinking water normal and eating they had some peas this morning too.. heat lamp isnt on also have window open to blow fresh air thru and its around 60 outside. Sorry just worried

 

[KCNC06]

My Pekin ducklings went through a mouth breathing/panting phase around that age and I'm fairly certain most of them went through a heavy sneezing phase. Like they'd do a bunch of sneezes in a row several times a day. None ever acted "sick" though so I tried not to worry. I'm guessing those tiny downy feathers might just tickle their sneezers sometimes.
As for the panting/heat issue, I'm not sure about all duck breeds but I know from snuggling experience that Pekins do get hot at a young age. My super spoiled baby (crazy to imagine that one is more spoiled than the rest considering how spoiled they all are), Bill Bill, loved to snuggle when he was small and I was amazed by how overheated I'd get having him lay on me. The weird thing I've noticed with mine is even though they're panting and have plenty of space to get away from the heat lamp if they want, they will often choose to lay under the light. They move away or go get water if they're too hot. I'm pretty sure my two youngest Pekins are around the same age as yours. Right now one is snuggled under a lamp and the other is across the room away from the light. My adult ducks seem to do this outside too, only not with a heat light obviously. Some will lay under trees in the shade while others will stay stretched out in the sun even when they're panting. I figure some just like being extra warm like a dog I used to have. She would stretch out in from of the fireplace, so close that her belly would turn red and she'd pant like crazy. If I moved her she'd pout like she was being punished. Critters are just weird sometimes.