I am going to assume that this is a Harry Potter question. My guess would be healing the wing of an injured post owl would be very similar to healing healing the broken arm of a human, which in the Wizarding world seems to be an instantaneous process. The fact that Professor Grubbly-Plank took several days to return Hedwig to Harry suggests that she simply wanted to make sure that the process had worked correctly and that Hedwig received plenty of rest before delivering any more letters.
Snowy owl, lives only in circumpolar regions
The Snowy Owl.
Snowy owl. -facepalm- you said it was SNOWY! Snowy-snow Snow- white.
because the color of its feathers is a snowy white
The snowy owl lives in the tundra.
in the spring
the snowy owl likes to eat
Because of its white basic coloration.
The size of the snowy owl is about five pounds or up.
A snowy owl is a bird and has feathers not fur.
by catching the owl
Yes, it becomes the Spring Owl, Summer Owl, Autumn Owl then the Snowy Owl at the end of the year.