The Link Between Diet And Behaviour In Pets - Petdirect
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The Link Between Diet And Behaviour In Pets

The Link Between Diet And Behaviour In Pets

Just like humans, cats and dogs can be affected emotionally and behaviourally by what they eat. If your furry friend has started acting out of character—maybe they’re more anxious, low energy, or overly hyper—it might be time to look at their diet. At Petdirect, we get pet, and we know a healthy belly can mean a happy brain. In this blog, we’ll explore the connection between pet diet and behaviour, including signs to watch for and how to support your pet’s mental wellbeing through nutrition.

Why Diet Matters For Your Pet’s Behaviour

From energy levels to stress management, the nutrients your pet consumes play an essential role in their overall behaviour. Pets need balanced meals filled with the right combination of proteins, fats, vitamins, and minerals—not just to thrive physically, but mentally too.

For example, a lack of specific nutrients like B vitamins or omega-3 fatty acids can contribute to irritability or anxiety. On the other paw, a high-carb or sugar-laden diet may make some dogs and cats more excitable or reactive than usual. Quality food isn’t just about filling their bowl—it’s about fuelling them for calm, focused, and happy behaviour.

If you suspect diet could be affecting your pet’s behaviour, consider transitioning to food packed with whole ingredients and nutrients that support mood and brain function, such as ZIWI, K9 Natural, or Feline Natural.

Common Behavioural Issues Linked To Diet

While every cat or dog is unique, there are some common behavioural signs that may be linked to diet:

  • Anxiety and restlessness: Can stem from poor gut health or lack of calming nutrients like magnesium or L-tryptophan.
  • Lethargy: May be related to nutritional deficiencies or unbalanced meals lacking energy-boosting proteins and fats.
  • Hyperactivity: Often linked to excessive carbohydrates or artificial ingredients in lower-quality food.
  • Aggression: Sometimes affected by blood sugar fluctuations or intolerances to specific food ingredients like grains or beef.

Soothing nutrition can make a big difference. Look for foods that promote digestive wellness and calming, like those enriched with probiotics, omega oils, or natural stress-relievers available in our calming essentials collection.

How Gut Health Affects Mood

It may sound strange, but your pet’s tummy could be talking to their brain. The gut and brain are closely connected via what’s known as the gut-brain axis. When your pet’s digestive health is off-balance, it can negatively impact mood and behaviour.

Supporting gut health with prebiotics, probiotics, and highly digestible food can help your furry friend feel better mentally and physically. Explore options in our pet health range, including Fourflax and Olive's Kitchen supplements to aid in digestive harmony.

Choosing Nutrition That Supports Behavioural Balance

Here are a few food features to look out for that may support a calmer, more balanced pup or kitty:

  • High-quality protein: Sources like chicken, salmon, or venison help maintain steady energy and muscle health.
  • Omega-3 fatty acids: Found in fish oil, these support brain health and can help reduce inflammation and anxiety.
  • Digestive aids: Probiotics and prebiotics to nourish the gut and support mood stability.
  • Whole foods, minimal fillers: Diets free from artificial colours or preservatives encourage even energy levels.

You can browse balanced diets designed for holistic pet health in our science health nutrition range, or choose a high-quality NZ made option from brands like Animals Like Us or Omega Plus.

Supplements That Support Behaviour

Sometimes food alone isn’t enough. Adding a high-quality supplement can support your pet’s mental wellness. Look for calming aids that include ingredients like chamomile, passionflower, magnesium, or L-theanine—naturally known to reduce anxiety and promote a sense of calm.

Browse mood-supporting picks in our pet supplements collection or explore support specifically for dogs or cats who need help relaxing—whether it’s due to a change in routine, separation stress, or general nerves.

When To Talk To A Vet

While a change in diet can bring big improvements, it’s important to talk to your vet if your pet is displaying severe or ongoing behavioural changes. They’ll help rule out medical causes and may recommend a therapeutic diet like Hill’s Prescription Diet or Pro Plan Veterinary Diet for tailored support.

Feed Their Mind And Body

At Petdirect, we believe better behaviour starts in the bowl. From gentle, natural options to high-performance diets, we help Kiwi pet parents choose food that nourishes the body and calms the mind. Got questions or need help choosing the right food? Our team is here for you. And if you’re keen on making smarter, stress-free shopping choices, try our Autodeliver service and unlock exclusive deals with Pet Perks.