Why is my dog vomiting yellow foam?

Seeing your dog vomit yellow foam can be worrying, especially if they otherwise seem okay. This type of vomit is often linked to bile and can happen for a few different reasons, some minor, some worth paying closer attention to.

Understanding what’s behind it, and whether it’s a one-off or part of a pattern, helps you decide what to do next.

What yellow foam vomit usually means

Yellow foam vomit is commonly associated with bile, a digestive fluid produced by the liver. It often appears when a dog’s stomach is empty, such as first thing in the morning or after long gaps between meals.

In some cases, it can be linked to mild stomach irritation, dietary changes, or eating something that didn’t agree with them. Occasional episodes, especially when a dog otherwise seems well, are often not serious.

When vomiting yellow foam may be a concern

Repeated vomiting, vomiting combined with lethargy, appetite changes, diarrhoea, or weight loss may point to something more than an empty stomach.

Conditions affecting digestion, inflammation, or underlying illness can sometimes present this way. The key difference is whether vomiting is isolated or recurring, and whether other changes are appearing alongside it.

This is where context matters more than a single episode.

Why tracking patterns makes a difference

Vomiting can be easy to dismiss when it happens occasionally, but patterns often emerge over time. Frequency, timing, diet changes, stress, and routine all play a role.

Using Blueprint, owners can log vomiting episodes, meals, timing, and other symptoms as they happen. This creates a clear record you can refer back to, making it easier to spot trends and share accurate information if further care is needed.

See the full picture, not just the symptom

Yellow foam vomiting can be harmless or a sign of something more. Blueprint helps you track symptoms, routines, and changes over time, so you’re not relying on memory when it comes to your dog’s health.

See your dog’s health clearly with Blueprint
Mobile screen displaying a pet health app for dogs, showing body condition, dental health, a notification about vet records, and options to add a reminder, log a note, or transcribe a vet visit.