shitzu pup throws up

Question
My 6 month shitzu throws up foamy white liquid about 3 times a week.  It is not after she eats.  Can't figure out what the problem is.  Took her to the vet and she's on non-allergen dog food.  She's usually fairly frisky, but seems to be a bit more lethargic.  Any ideas?

Answer
Hi Dianne and thanks for your question.

Is she throwing it up or coughing and gagging it up?

It sounds like more of a respiratory thing as opposed to a tummy thing. I would have my vet do a bacterial culture on the sputum, as it could be a respiratory infection. Take her temperature (rectally). Normal is around 101 - 102 and a temperature higher than that would indicate an infection.

I honestly don't think that this is a tummy problem. White foam is NORMALLY from the respiratory tract, while yellow foamy liquid is from the tummy.

Hope this helps and let me know how it's going.