"My dog is vomiting this foamy white or yellow stuff! What is wrong with my dog?"
Since a dog's stomach is highly acidic, an empty stomach can cause nausea in many dogs. These "hunger pukes" are most common in raw fed dogs, since raw food is digested in approximately 4 hours as opposed to kibble fed dogs. Kibble takes approximately 8 hours to digest, which is why raw fed dogs tend to vomit in the morning before they get to eat breakfast.
The solution is easy! You can increase the amount of food your dog eats in a meal or offer a snack mid-day. You can also split the meals into three times a day instead of two, or feed your dog's last meal right before bed.
Adding extra fibre to the meal can help keep dogs full longer; Pumpkin, sweet potato or green beans help bulk up food! A handful of dehydrated raw treats or a kong full of frozen pumpkin and yoghurt mixture can also curb hunger and prevent that foamy bile from ending up on your floor.
This type of vomiting is not dangerous, but the important part to remember is that your dog is hungry and either needs more food per meal or needs a snack to hold them over until dinner. Providing more food should stop the vomiting immediately.
If the vomiting is accompanied with other symptoms such as fatigue and diarrhea, you'll need to see a veterinarian since there could be a more serious problem at hand.