I am very sorry that your yorkie has to go through this. I do not know much about the condtion, only that when they get a little older they have a harder time.
I would try to keep her calm as much as possible and relaxed . It does not hep if she gets all excited and then has even a harder time breathing. I know my Suzi pants real hard after playing, and she does not have it. I think sometimes maybe, the condition can't be prevented and it just happens.
__________________  "No matter how little money & how few possessions, you own, having a dog makes you rich." |