Why is your turkey poult legs splayed it cannot stand on its own but otherwise healthy and scoots around?

This may have been caused by trauma, but another possibility is a manganese deficiency. After about 6 weeks of growth, when your turkey is growing in the long adult feathers, you need to swap his feed from a starter-grower mix to a grower-finisher mix.

Manganese deficiency causes the tendons of the legs (and probably the rest of the tendons as well) to become long and loose. The tendon eventually slips out of its place and no longer keeps the leg braced upright, causing the leg to be functionally useless.

Once the tendon has slipped, you can't get it back into place - your turkey will be splayed out like this for the rest of its life.