My 7 year old female yorkie started stumbling around last night. I noticed that her tounge has been hanging out of her mouth, which is not normal for her. She doesnt seem to be in any physical pain and is eating and drinking her food. I took her outside and she would come back to me when I called her. She has had 3 litters of puppies (the last litter was 3 years ago) and I am planning on getting her fixed as soon as I can. She is currently in heat. Any suggestions or comments would be greatly appreciated!!