Back leg

Question
I have a min pin she is 7 months old and just over 4lbs she is seemingly favoring her back left leg. She will run and jump with no problem however when she is standing while she eats she will hold the leg close to her i have felt and rotated it and it doesnt seem to hurt her as she wont yelp if i move it or touch it. I just dont know why she does this. She was spade a week ago and it seems she started this after

Answer
It is quite possible that her leg is sore from being in a position where it was extended and tied down to facilitate the spaying.

However, if this isn't better in a few days, then a visit to the vet is in order. Young dogs are prone to growth plate issues with their bones and other problems so it is wise to have it examined by your vet.