Vomiting in dogs can be caused by a variety of things, including eating something they shouldn't have, an underlying medical condition, or even motion sickness.
Whether or not your dog is also having other symptoms, such as diarrhea, lethargy, or loss of appetite
Eating something they shouldn't have, such as garbage or a foreign object
If your dog is vomiting and also has other symptoms, such as diarrhea, lethargy, or loss of appetite
Offer small amounts of water or bland food once the vomiting has stopped.
Make sure your dog has a safe place to eat and drink.