If your dog struggles with anxiety, whether it’s separation stress, sound sensitivity, or general nervousness, you might be surprised to learn the root cause of gut health & anxiety in dogs.

At Puppy Tail, we believe real wellness starts from within. And in 2025, the connection between gut health and emotional wellbeing is clearer than ever. Here’s how your dog’s tummy might be affecting their mood, and what you can do about it.

What Is the Gut–Brain Axis?

The gut–brain axis is the two-way communication system between your dog’s digestive tract and their brain. It links the nervous system to the gastrointestinal system, meaning what happens in the gut can directly impact mood, stress levels, and behaviour.

In fact, around 90% of serotonin (the “feel-good” hormone) is produced in the gut, so when things are off in the digestive system, it can trigger emotional imbalances too.

Signs Your Dog’s Gut May Be Affecting Their Mood

Gut health and anxiety often go paw-in-paw. Look for signs like:

Diarrhoea, gas, or frequent stomach upsets
Excessive licking or paw chewing
Unusual clinginess or withdrawal
Pacing, panting, or restlessness at night
Overreacting to noise or a change in routine

These symptoms may indicate an imbalanced gut microbiome, which can influence how your dog processes stress.

How Food Supports Gut Health (and Calmer Behaviour)

The good news? You can nourish the gut to support emotional balance, and it starts in the bowl.

Look for meals that are:

Rich in prebiotics (like pumpkin, flaxseed, and chicory root) to feed good bacteria
Naturally probiotic (like fermented vegetables or goat’s milk) to support microbiome diversity
Free from artificial additives that can disrupt gut flora
Made with fresh, whole ingredients to support digestion

Puppy Tail meals are crafted to be gentle on sensitive stomachs while giving the gut exactly what it needs to thrive.

Functional Ingredients That Help Calm from the Inside Out

In addition to pre- and probiotics, certain ingredients are known to support calmer behaviour and gut harmony:

Chamomile: Soothes the digestive tract and eases mild anxiety
L-theanine: An amino acid that promotes relaxation
Omega-3 fatty acids: Reduce inflammation linked to both gut imbalance and mood disorders
Bone broth: Rich in glycine and gelatin to support the gut lining and neurotransmitter function

Including these naturally calming ingredients as part of your dog’s daily routine can help them feel more grounded and less reactive.

When to Talk to Your Vet

If your dog shows ongoing signs of anxiety or gut issues, a visit to your vet is essential. They may recommend:

Stool testing to check for gut imbalance
Behavioural training support
Diet adjustments or the addition of a gut-health supplement

A holistic approach: combining nutrition, environment, and behaviour is often the most effective path to helping your pup feel calm and confident.

A Happy Gut Means a Happier Pup

Anxious behaviour often starts with internal discomfort. By supporting your dog’s gut health, you’re not just easing tummy troubles. You’re creating a foundation for emotional resilience and day-to-day calm.

At Puppy Tail, we’re proud to help you feed with purpose, so your dog feels their best, from the inside out.

The Link Between Gut Health & Anxiety in Dogs