i got to take care of my parents now but i have lots of sites - as i used to answer lots of these online when i had the time-
http://goldcoastbirdvet.weebly.com/bird-injuries-broken-legs-and-wings.html
above is Dr Ross face book acct with 300 videos about injuries and how to fix them.
http://www.starlingtalk.com/fractures.htm good pictures
Fractured Bird Leg - Long Beach Animal Hospital
www.lbah.com/word/fractured-bird-leg/
http://www.justanswer.com/pet-bird/2kbxd-pigeons-toe-broken-looks-its-90-degree-angle.html
http://www.pigeons.biz/forums/f6/broken-legs-53404.html
You just have to look at the condition and make a Spint which will answer.
I usually use the Handle from a plastic Spoon or Fork, especially the kind which has a sort of 'trough'. I cot the Handle free of the Spoon or Fork end of course, and, round the cut edge.
I bend this by warming the local area over a Cigarette Lighter, and, make it so it is a sort of lazy 'Z' shape, which wil correctly fit the Leg in question, and, once in place, will keep the Bone ends up together for them to mend. You do not want there to be a gap or a mis-align where the break is.
The lazy 'Z' shape with the Sling, allows the Leg to be in a relaxed and somewhat extended position, comfortabe for the Bird, and excellent for the Bones ot be correctly alinged and the Bone ends to be brought together properly.
I fold some paper Towel into a long folded strip of maybe four layers of the paper Towel, and, tape that along the side of the Splint then, where the Leg will be, then, gently tape the Leg around that in all three parts of the lazy 'Z' shape.
The Tape I use is called 'Micropore'; and is 1/2 inch wide...and this Tape can be had of any Home Medical Supply place for like 99 Cents a Roll.
This type of Splint works very well, and, with the correct Tape kind, is easy to remove later, once the Leg has had time to heal.
The image you show does not appear to answer the needs of the Leg for alignment or for the ends of the Bone being brought together.
Pictured: Anna Sloan, from the Macaw and Cockatoo Rescue of New Mexico, builds alexandrine, Roo, a go cart to help correct splayed legs.
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500 × 245 - ... cart to help correct splayed legs. Source: Why Rescue Birds Aren't Free
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Source: Why Rescue Birds Aren’t Free
https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
generic chicken aid
https://sites.google.com/a/poultrypedia.com/poultrypedia/poultry-podiatry
fantastic instructions for spayed legs and support and diagnosis of diseases
http://www.worldwidewounds.com/2003/november/Cousquer/Avian-Wound-Management-Part-2.html
http://fresh-eggs-daily.blogspot.com/2012/03/bumblefoot.html
http://fresh-eggs-daily.blogspot.com/2012/07/comb-to-toe-checkup.html
Here is an easy recipe for a DIY Antiseptic Ointment to apply to a wound or cut in a pinch. For use on people and chickens.
Antiseptic Ointment
2-1/2 ounces beeswax
3/4 cup olive or coconut oil
1/4 teaspoon liquid vitamin E (helps repair damaged skin)
10 drops lavender essential oil (relaxant, pain reliever, antibacterial, anti-fungal)
10 drops lemon essential oil (antibacterial, antiviral)
~Beeswax donated by beeyondbeeswax.com~
Grate beeswax and melt with olive or coconut oil over low heat in a double boiler. Remove from heat and stir in the Vitamin E and essential oils. Pour into a small covered container and cool. Store in a cool, dark place.