Help. Muscovy ducklings too small

[Nikita6588]

Hello.
I desperately need help here.
I have 3 beautiful muscovy ducklings from my own flock. 18 July they will be 4 months old, but they are very small. They hardly have feathers, they are mainly still little fluff balls. The biggest of the 3 is about 15cm from chest to tail. I don't know what I'm doing wrong here. I feed them mixed fowl feed twice a day and all the table scraps. They also get into the dog food quite often. The rest of the time they are roaming free with the rest of the animals.
What could be the reason for this?
Or am I overreacting? (happens quite alot)

 

[tmorgan46]

Born on the 8th of July? That makes them almost a week old. We have two week olds running around with their mothers outside and they look like they just hatched a few days ago. Give it another couple of weeks and you'll be amazed at how quickly they begin to grow. They're cute little balls of fluff, but once the growth spurt hits, the cuteness doesn't stop but the smallness does.

 

[Nikita6588]

They will be 4 months old in the 18th of July.

 

[Historienne]

Can you post pictures of them? That would probably help folks to give advice.

 

[tmorgan46]

They will be 4 months old in the 18th of July.

Sorry, I have no idea how I didn't read that correctly... Like Historienne said, pictures would help immensely.