What Does It Mean When A Dog Is Vomiting White Foam?

First and foremost is your dog behaving differently than normal, quieter, more erratic, nervous? If your canine friend is continuing to happily go about his or her business than it is probably nothing, my dog Daisy eats lots of grass when she has an upset stomach and regurgitates it to cleanse her belly. This is usually white and foamy but with bits of undigested grass in it.
If your pooch is behaving differently or is drooling heavily, retching lots and/or has a hard, swollen abdomen then we could be looking at a condition known as Bloat.
Bloat, or as it is sometimes referred to torsion, gastric torsion, or gastric dilatation-volvulus (GDV), is when the stomach becomes overstretched by excessive gas content and can twist. It is extremely painful and can prove lethal. It is regarded as the second biggest cause of premature death in dogs behind cancer. Mortality rates in dogs range from 10 to 60 per cent, even with treatment, while with surgery, it is 15 to 33 per cent.
Bloat is most common in deep-chested breeds such as German Shepherds, Great Danes, and Dobermans are particularly at risk.
There are many possible causes of Bloat but it is best to avoid exercising your dog immediately before or after eating, break up meals to two or three small ones a day rather than one large meal a day and do not feed your dog dry mix/biscuit exclusively.
If you are really concerned then the only course of action I can prescribe is to visit your local veterinary surgery and get your pooch seen to there. If it is nothing then you'll have a weight lifted off your mind but if it is something then you are in the right place to start treatment.

If your dog is vomits  white foam occasionally without any other signs of illness then no need to worry. If your dog is having this condition since last 24 hours along with shaking, restlessness and pacing then he might be having canine bloat. This is medical emergency and need visit to vet. This condition can lead to death if not treated on time because it put pressure on the organs around stomach and can cause twisting of stomach. So, get help from local vet.

If the dog has been throwing up for 3 days it is likely that there is no food in the stomach, the white that your dog is throwing up is most likely just stomach acid and spit, if your dog isn't eating and has been throwing up for this long its not getting the nutrients it needs. You should take it to the vet. Hope this helps

My pitbull threw up last night n it was yellow n she don't eat or want to drink water, what could that mean?