We have a five year old chihuahua who has been throwing up about once a week for the past few months. This week she has thrown up about three times. We had blood work and a fecal exam done. Everything came back fine. She was also tested for heartworms, and that test came back negative as well. She also had an x-ray which didn't show anything either. She is eating and drinking normally, and she still gets excited to go outside for walks. She does sleep alot, but has always done that. Her urine is kind of dark bright yellow, and she has loose stools but not diarrhea. Our vet said it is probably nothing to worry about since all of her tests were okay. Do you agree with this, or should we push for further testing? If you think we should continue testing, what do you suggest the next step be? Thank you!