About 3 days ago my female 6 month old puppy Sydney started showing some scary signs of agressiveness. Anytime we did anything that she didn't like even a little...for example taking her tee-shirt on or off...she would bite. She took a pretty good chunk of skin out of my thumb. I had already scheduled her appointment to be spayed this week (yesterday). I am hoping that the behavioral changes were caused by her adult hormones kicking in and that it would improve once she got spayed. Granted this is only her first day after the surgery...but she bit this morning because we tried to take something out of her mouth that she shouldn't have.
Has anybody had similar problems? Any advice?