jazz 2010

I am at my wits end Jazz my little shih tzu hardly eats she is on advance puppy plus wet and dry three meals a day she weighs 3.2 kg and was eating fine up until 4 days ago now she has about 4 teaspoons a day. I have had her to the vet and they said she is fine just being fussy and they think her teeth are bothering her, can their teeth bother them that much that they dont eat much? Can some one help me i have tried raw diets but they make her sick and i have tried putting yoghurt on her meals and egg,cheese,gravy but she just sits there and looks at it she is still running around playing and drinking do you guys think it could be her teeth or something else?

Well my little shis tzu Jazz is toilet trained and will go to the door and ring her doggie doorbell every time. She gets left alone for a few 20minutes every day and up to 1 hour on some days and can hold it for that.she is confined to a large room but we live in the middle of nowhere so we go to town to do our weekly shopping and have no one to let her out side so what do i do when she needs to toilet would i be confusing her if she were to do it on puppy pads only for once a week or is that o.k And also how often should she need to go to the toilet through the night at the moment she goes 2-3 times wee only she sleeps in a large box with high sides and wakes me up when she needs to go is that to often? Any advice would be great oh and Hi every one