How Stress Could Be Affecting Your Dog’s Physical Health

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Nowadays, we all lead busier and busier lives. The word ‘stress’ is used a lot when it comes to humans, but stress can be a big problem for our dogs as well. It can cause lots of health issues in the short and long term, including digestive upsets like diarrhoea and colitis. If you notice changes in your dog’s poo, like mucus or blood, or see that they keep getting bouts of diarrhoea, it could be that stress is playing a part. In this article we’ll look at what causes stress in dogs, what effect that might have and a look at what you can do about it.

Causes of stress in dogs

Lots of things can cause stress in dogs. The most common ones are:

  • Separation anxiety.

  • A stay in kennels.

  • A new baby or relatives coming to stay.

  • You going on holiday. Even the sight of your suitcases coming out from under the bed can trigger stress.


  • A traumatic event like a fight with another dog.

  • Sound phobias like fireworks.

  • Breed. Some breeds of dog are particularly prone to stress.

  • Maternal stress. Trauma or stress in a pregnant dog can affect how likely the puppies are to be stressed in their lives.

Breeds of dog that are prone to stress

Stress can happen in any breed or crossbreed, but there are some breeds of dog that definitely seem more likely to be anxious and stressed. In my experience in practice, it tends to be smaller breeds and lapdogs, such as Cavalier King Charles spaniels, cocker spaniels and Bichon frise, but bigger breeds, such as border collies and German shepherds, may also be affected.

How does stress affect your dog’s body and health?

You may be surprised to know that stress is actually essential for life! The stress response helps save us in times of trouble. Acute stress, like being frightened walking alone in the dark, causes the release of adrenaline. This is essential to get you ready for fight or flight. Chronic or long-term stress, however, is a little different. When we, and our animals, are stressed for a long time, it causes the release of steroid hormones. Steroids are essential for life in small amounts and are excellent anti-inflammatories. However, they also affect the immune system in the way they work. Over time, the constant release of steroids suppresses the immune system and leaves the body vulnerable to infections, not to mention many other detrimental effects.

Recent studies have shown that there is a hugely important link between the gut, the brain and the immune system. So you can see that if an animal is stressed, anxious or depressed, the gut is one of the first systems to show it. It can cause all sorts of digestive upsets, such as vomiting, diarrhoea, colitis and excessive wind – none of which are much fun for you or your dog!

In the longer term, stress can cause lethargy and lack of energy, poor coat quality, skin problems and loss of appetite, as well as leaving the body susceptible to infection, as we mentioned.

What can you do to reduce stress in your dog?

Prevention is always better than cure, so try to get a dog that isn’t likely to be stressed in the first place! Dogs that have been raised in family homes, are well-socialised and habituated, and have calm mothers are much more likely to be well-balanced individuals later in life.

If you’ve taken on a dog and you don’t know their background, but they suffer from stress, talk to your vet. There are medications and pheromone diffusers that can help, as can seeing a good behaviour specialist. There may be subtle changes you can make at home to really help your dog feel more relaxed.

It might surprise you that there are also some foods that can help with stress. Highly digestible, balanced, complete foods for digestive health will definitely help if your dog has gut-related signs of stress, but there are also foods that have natural additives that are proven to reduce stress, too.

Stress in dogs can have many causes and many effects, but don’t despair – the more we understand about these complex animals, the more ways we have to help. If ever you think your dog is feeling anxious or suffering from stress, have a chat with your vet. The sooner you start to look at why, the sooner you can start to make your dog feel happier.

Reviewed by Dr. Hein Meyer, DVM, PhD, Dipl-ECVIM-CA