Commercial license: You can print and sell these models.
Few birds will have difficulty in keeping their claws open, that could be due to wounds or paralysis. Here we have two different models
one with plane surface on top which can be tied to claws directly with the help of a wire or thread.
The second one has slots where the claws can be placed, and the wire/ thread can be passed through the holes to tie the pads/ slippers/prosthetic to the bird's claw. Both the models have traction on the bottom.
Hope these designs may help some.
3D PRINTING SETTINGS:
Print in vertical position.
The models can be scaled in x-y-z directions while printing based on your requirement