We, my family, own a cockerspaniel. Lately, she has been very odd. She has been "wetting" the beds and very clung to us. She is always following extremely close to us and sometimes trips us up. Another thing is she has been shaking violently and breathing/panting heavily. We have taken her to the vet a couple times this month to get her checked out, and they diagnosed that she has headaches. I feel that there is more to it than this, however. Any insights?