Dog Breath Smells Like Fish – Causes and Remedies

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You cannot hold your furry friend responsible for their bad breath. Neither can you expect them to take care of their dental hygiene. Yes, we know you do your best to keep the bad breath away, but sometimes even your best is not good enough. Bad breath in pets can be a symptom of some underlying problem that may be causing difficulty. Sometimes, it is related to dental problems, at others, it could be related to their gut.

If you have persistently noticed bad breath for days, then you need to get it checked with a medical professional to find out the reasons for such bad breath.

Dog Breath Smell Like Fish- Causes

Dog Breath Smell Like Fish- Causes

We will not contest if your dog’s breath smells like fish or rotten eggs. We know what you are talking about. Now, this smell could be because of many reasons, but to begin with, let us keep our diagnostic efforts bare minimum. Let us look at the most surficial problems first.

1. Dental Hygiene

Before exploring other options, it is essential first to single out the most basic ones. Yes, there was a mention of exploring the “surficial” problems first. Still, if your dog’s breath has begun to smell like a fish, then chances are that the problem is not that surficial after all. When the food keeps getting stuck in your dog’s teeth, it leads to the growth of plague. It doesn’t happen in one day. Your dog’s oral health could have been compromised for weeks, months, or even years.

There is nothing to worry about in such a case, but it is always better if you get to know about the problem early. Because the longer you wait, the more will be the problem. When not removed in time, Plague tends to turn into tartar, which can even lead to gingivitis. Your dog’s breath can become bad at any stage, but if you have noticed an unpleasant change in their breath, it is best to take them to their vet for further treatment.

2. Diet

The next thing is related to the first point itself. If your dog is eating something they are not supposed to, it can also lead to bad breath. For example, if your dog is eating too much fish, their breath is bound to smell like fish. This is not something to worry about, but if you are not feeding them fish deliberately, you might want to find out what is causing this sudden change in their diet. Dogs tend to explore their surroundings through their mouths; chances are they have been eating something you do not have any knowledge about, which is causing the bad breath.

All the problems related to diet can be resolved with lifestyle changes. First, ensure that your dog gets enough opportunities to get involved in physical activities.

3. Medical Problems

Some medical conditions can also lead to bad breath in dogs. This one could be slightly serious as it may be a symptom of underlying health issues. Most of the time, dogs could be releasing the excessive acid in their stomach through their mouth. If this continues for a few days, the smell in their mouth could turn bad. This may also happen if they are unable to poop properly.

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These medical problems are common and can be cured with the help of a vet in a couple of days. After that, they would be put on medication, and the acidity situation will have to be fixed from the root to relieve your dog from any stomach issues as well as bad breath issues. Of course, if the problem does not turn out to be as severe as to be put on medication, then you can use some home remedies to resolve the problem.

Dog Breath Smell like Fish – Remedies

Dog Breath Smell like Fish - Remedies

In extreme cases, it is highly advisable that you get in touch with your pet’s vet. However, there are some ways in which you can treat your dog’s bad breath in the comfort of your home. As discussed earlier, smaller problems can be easily treated. Still, it is important to keep in mind that temporary solutions won’t suffice if you want your pet’s overall well-being. That is why, be it oral hygiene or acid issues. You need to look at the root cause and ensure that you make lifestyle changes to avoid such troubles regularly.

1. For Dental Troubles

The most basic thing to do in order to ensure your dog’s dental hygiene is to clean their teeth each day. After eating fibrous food, brushing their teeth becomes even more important. Apart from this basic habit, you can get your furry friend a chewable toy that can work wonders for their dental health. It is mostly meant for dogs with teeth troubles and to allow aggressive dogs to relax. Still, active chewing can also help prevent any food from getting stuck between your pet’s teeth.

It would be best if you also took your pet to regular check-ups and, in extreme cases for specific treatments. You need to let the professionals take charge after doing and trying your best. Their bad breath may cause trouble for your or people around you, but a bad cavity could cause pain and discomfort for your pet.

2. For Gut Problems

You need to ensure that you provide your pet with a healthy and nutritious diet. A balanced diet with fibrous food can help regulate their gut. It would help if you taught them healthy eating habits to avoid any future troubles. Just as they need adequate food for a healthy bowel movement, they require water. Keep them properly hydrated to aid their digestive system and maintain the ph balance in the body.

Mostly when dogs are not properly fed, they tend to find other things around them and gulp it down their throat without any thought. Both the situations can be harmful to their gut and create gastric issues that may be causing their mouth to smell like a fish.

3. For Serious Medical Conditions

A bad smell could be an indication of troubles related to their liver or even kidney. There may not be a direct or an apparent relation visible here. Still, you need to be extra cautious if you cannot find other reasons to explain their breath smelling like fish. Keep their vet updated on their health status to avoid any unnecessary trouble. You must make it a point to take your furry friend on regular walks or try to involve them in some physical activity to keep them on their toes. You need to watch out for any sudden change in their behavior or their eating habits.


If your dog’s breath has been smelling like a rotten fish, then hopefully, after reading this entire blog, you would have had some idea about what might be causing it. After a systematic analysis, you won’t find it difficult to reach a conclusion and take immediate action to resolve the problem. All you need to do is to keep track of their behavior, check their mouth frequently, and notice if they are chewing on anything other than their food.

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