[QUOTE=Appsolute;7672322]
How severe is the condition?
My horse was born windswept. In the first week she looked like THIS.
By about 3 weeks she was tightening up - looked like THIS.
By a month old she was straight (this picture is from 4 months).
And now she is a sound healthy 7 year old. She is “high low” as in stands in a scissor stance when she eats and grazes - causing one heel to grow tall, and the other to be under run. But frequent trims keep it in check.[/QUOTE]
Your filly wasn’t really “windswept” she was just down in the pasterns. That is pretty common and almost all foals grow out of that.
Windswept foals are usually effected higher up, in the knees & hocks:
http://images.search.yahoo.com/images/view;_ylt=AwrTcXcP_tBTgCwAKi.JzbkF;_ylu=X3oDMTIzZmk1cTAwBHNlYwNzcgRzbGsDaW1nBG9pZANhOGE4MGFhMDcwMDJiZjhhYTE2NjliYmRmZTJhYWFkMARncG9zAzQ2BGl0A2Jpbmc-?back=http%3A%2F%2Fimages.search.yahoo.com%2Fsearch%2Fimages%3Fp%3DWindswept%2Bfoals%26fr%3Dmcafee%26fr2%3Dpiv-web%26tab%3Dorganic%26ri%3D46&w=794&h=489&imgurl=www.dynasplint.com%2Fuploads%2FAngular_Limb_jack.jpg&rurl=http%3A%2F%2Fwww.dynasplint.com%2Fangular-limb%2F&size=65.0KB&name=BEFORE%3A+4+day+old+<b>foal<%2Fb>+with+<b>windswept<%2Fb>+hind+limbs.+AFTER%3A+8+weeks+of+…&p=Windswept+foals&oid=a8a80aa07002bf8aa1669bbdfe2aaad0&fr2=piv-web&fr=mcafee&tt=BEFORE%3A+4+day+old+%3Cb%3Efoal%3C%2Fb%3E+with+%3Cb%3Ewindswept%3C%2Fb%3E+hind+limbs.+AFTER%3A+8+weeks+of+…&b=0&ni=21&no=46&ts=&tab=organic&sigr=117d80evp&sigb=136o13541&sigi=11gbgld81&sigt=12lqttu08&sign=12lqttu08&.crumb=u9zHHazF9Vs&fr=mcafee&fr2=piv-web
To the OP, I would say no one on this board can give advice without detailed pics & such.
I personally don’t care of surgery on foals simply because then you have to keep them locked up for 6 wks and I think that’s VERY unhealthy.
5 years ago I had a filly foal who had several different abnormalities in her legs. My local vet said she was the worst she’d seen that season. At 3 wks of age, I took her to the “leg expert” vet who told me point blank he was “90% sure” she would not straighten without surgery.
This was not my first rodeo in terms of leg/foal issues, so I opted to decline surgery.
Instead he applied “paint on” hoof extenders (work SO much better than glue ons) and instructed me to keep her on stall rest.
I took her home and did NOT keep her confined, but put her on highly monitored turn out in a flat paddock big enough for her to canter & buck. If she started to get wobbly, she & mom went in the stall for afew hours.
I also started her dam on a double dose of a product I REALLY like: OCD Pellets.
We continued that regime, replacing the hoof extensions as needed. I never told the vet I wasn’t confining her 
By 3 months, she was close to straight…good enough for the vet to tell me I could now turn her out (she’d been on 24/7 T.O. for over a month already).
I kept her on the OCD Pellets for her first 18 mos. As 4 yr old, she was started and put in training (dressage). I JUST sold her and her PPE was done by a (retired) head of orthopedic surgery at a major vet teaching hospital.
He did a very indepth lameness eval with some 40 x-rays. The buyer gave me a copy of the vet report and told me to frame it. In the summation, the vet states:
“Although it is rare to not find any abnormalities in a horse upon exam, such is the case with this mare. I find nothing that would hinder her future performance ability…”
So very happy ending. BUT all cases are different. I’ve also had a foal who was so windswept front AND back he had to be put down at 5 wks despite our best efforts.
Sorry that’s not a more definite answer, but again, much depends on the severity of the condition and it’s tough to judge that on a BB.