My dog was spayed about a month ago. Sfe just started this weekend chewing on her incision area and whining. She is only whining and chewing for a minute or two and then goes back to her normal activity and she is only whining for a few times a day (maybe 2-3). She is eating, drinking, and playing like normal. I took a picture of her incision. It isn't hot and not hard. Can anyone help me tell if there is a problem?