Finally got to see the pics of your foal. Those legs are not HALF as bad as some of my foals! I really wouldn’t panic too much, foals are amazing things.
One of my warmbloods was so valgus her knees CROSSED OVER when she stood. She straightened without any assistance except limited turnout space and hoof trimming. She went on to be a multi-champion show horse winning her first supreme aged 10 months.
That same mare produced another foal that was quite dysmature and very lax behind, his toes pointing up and his fetlock on the ground. His heels and pasterns were loosly wrapped with softban fluffy stuff to protect from the hard ground. He was kept quietly in a small grassy area. He did not have heel extensions because his rate of improvement was incredible. He had no other assistance. He has won several champions as a foal, the first when he was only 3.5 months.
Another of mine was so contracted in both front limbs he stood on the front his fetlocks. He (and his poor sweet mother) were confined to a large covered yard for 2 months with no turnout. He was given oxytet, and a lot of splinting and wrapping, plus shoes with toe extensions. By 4 months there was nothing to see of this whole ordeal except a small pressure wound scab left from all the wrapping.
My vet also tells of a foal last year that was so terribly windswept behind it could barely walk. The vet hospital strapped aluminium rods to the worst leg! He had dreadful deep pressure wounds all down his white stockings. He is now a yearling with perfect hind legs and no sign of any scarring at all.
Foals are amazing!