I have a one year old Shih Tzu female. Recenty we had a friend who had a
puppy who stayed with us for the last two weeks. The day before yesterday, he left with his dog. They got along great and played a lot. Now, all day yesterday she has seemed mopy,down, maybe depressed, but she has also been randomly shaking. I know she is due to go into heat early next month, but I'm not sure this is normal?
She didn't act like this when she went into heat when she was 6 months old.