Yellow foam often contains bile after fasting; white foam may be gastric mucus or reflux—but repeated episodes or abdominal pain need urgent evaluation.
Questions that change urgency
Are they eating? Any foreign toy ingestion? Distended painful abdomen?
Pet NGON does not manage acute vomiting—clinic first.
Once stable and feeding resumes with vet approval, bathing removes dried saliva and coat soil.
Next step: ER if non-stop vomiting or bloating; Pet NGON grooming after recovery only.