I have a 9,5 months old middle sized male, who have east-west feet. He often stands wrong, but sometimes he can put his legs nearly correctly.
He is with me from 3 weeks, but I know that he had nice feet when he was a puppy. Maybe something went wrong during the growing. His father and mother have nice and correct legs too. (He is from champion bloodline.)

I can put his legs correctly if I stacked him, and as I saw and feel the bad stacking is came from the elbows not the wrist. He is little bit narrow in the front.

Im searching for experiences, is there a chance to solve this bad standing during the mature? Is there any vitamins or food for his good mature to support his legs and front in mature?

I give two pictures about his worst standings and sittings. Sometimes he put his two front legs too near each other with east-west feet, sometimes only one leg is east/or west, the other is correct...and in very rare times he put them nearly correctly...

https://drive.google.com/file/d/1uVL6Ghr2iUgrgGK-9MuDMab0KzrvWEI4/view?usp=sharing

https://drive.google.com/file/d/1rq2UicdjlJ9RkX9P2wPbKhV1CaYMSPGk/view?usp=sharing

Thank you!

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I've never known it to correct itself, as you say it comes from the elbows and is often associated with narrow fronts too, and being tied at the elbows. It's an incredibly difficult fault to breed out, my eldest silken has it and I know exactly where it's from. I can stand her correctly, by kneeling behind her when she is stacked and putting a hand under her chest and pushing out her elbows. I would not breed from a dog/bitch with this fault so despite being a rare breed my girl was spayed.

Not all narrow fronts and 10 to 2 feet are hereditary though, I've seen good pups from good lines go this way with over exercise, but again it doesn't correct. Though with maturity and bodying up it may seem less obvious.

Coming from a breed that notoriously can have east/west fronts () this does start with the elbows not being right.  I see Noel Fitz. correcting such problems all the time and can say once an east/west front, pretty much always one.   What you have there is nothing like what I've seen!!  If that's any consolation.

It maybe worth swimming the pup in a hydro pool to broaden and strengthen the chest area which may help with feet placement. Thats all i can think of but i doubt it will correct it completely