I have a 3 year old adopted 4 months ago that the last few days will not eat. I have made homemade food (which she liked) lamb, rice, veggies, apple. Flaxseed but now she doesn't want anything I give her. She ate some grass awhile ago but seems relestless. She did eat a salt and vinegar chip the other day when a guest dropped it on the floor. Would this have anything to do with her upset stomach

Oh by the way she is a chihauhau

I have moved you question into it's own topic.
It is better to start new questions of your own instead of writing in an old topic, you will get more replies.

I doubt the salt and vinegar chip would have caused her upset stomach but anything is possible.

A dog going off it's food is not usually an emergency, just means they have an upset stomach or are generally feeling lousy.

However if it has gone on for more than 2-3 days I would definitely be making an appointment at your vets for a check-up.

I know my dogs sometimes refuse to eat simply because they are sick of the food that is on offer. They don't like eating the same thing day in, day out (yes they are too spoilt)
What I do is to buy some new flavors to add to their regular food.

Just make up the bulk of the food like you normally do but then add a small amount of something new to keep it interesting, I alternate between tinned sardines and beef/chicken/lamb mince.

Does she eat any regular dog food at all or is it all home-made?