Can Dogs Have Canola Oil? A Complete Safety Guide

You’re cooking dinner, your dog is giving you the eyes, and you wonder: can dogs have canola oil? Perhaps it splashed into their bowl, or you’re considering adding it to their food for a shinier coat. The good news is that canola oil isn’t toxic to dogs, but whether it’s the best choice for their health is a different question entirely.

Is Canola Oil Safe for Dogs?

Canola oil is derived from the rapeseed plant and is one of the most widely used cooking oils in the UK. It’s non-toxic to dogs and provides a mix of fatty acids, including both omega-3 and omega-6.

Here’s what makes canola oil acceptable in small amounts:

• It contains alpha-linolenic acid (ALA), a plant-based omega-3 fatty acid
• It has a relatively balanced omega-6 to omega-3 ratio (approximately 2:1)
• It’s low in saturated fat compared to many other cooking oils
• It’s widely available and affordable

Many commercial dog foods include canola oil as an ingredient, so if your dog has been eating one of these foods, they’ve already been consuming it without issue.

However, canola oil goes through extensive processing, typically involving high heat, chemical solvents, and deodorisation. This refining process strips away many of the natural nutrients found in the original rapeseed, leaving a fairly neutral oil that’s high in calories but low in the bioactive compounds found in less processed alternatives.

A peer-reviewed veterinary nutrition review notes that canola oil is a source of the plant-based omega-3 ALA, but that dogs convert ALA to the more usable EPA very poorly, which is why marine sources like fish oil, which supply EPA and DHA directly, are generally more effective for omega-3 benefits.

Verified sourceToday's Veterinary Practice (ACVN Nutrition Notes, authored by a board-certified veterinary nutritionist) · read the source →

Understanding the Omega Fatty Acids in Canola Oil

One of canola oil’s selling points is its fatty acid profile. Let’s break it down.

Per tablespoon of canola oil (approximately):

• Calories: around 120
• Total fat: roughly 14g
• Omega-6 (linoleic acid): approximately 2.8g
• Omega-3 (alpha-linolenic acid): approximately 1.3g
• Monounsaturated fat: approximately 8.9g
• Saturated fat: approximately 1g

The 2:1 omega-6 to omega-3 ratio is actually better than many other vegetable oils, soybean oil, for instance, has a ratio closer to 7:1. This is one area where canola oil does reasonably well.

The catch is that canola oil’s omega-3 comes in the form of ALA, which dogs must convert to EPA and DHA before they can use it effectively. Research suggests that dogs convert ALA to these more useful forms quite inefficiently. By contrast, fish oil provides EPA and DHA directly, making it far more effective for supporting joint health, brain function, and anti-inflammatory processes.

Risks of Too Much Canola Oil for Dogs

While canola oil is safe, too much of it can cause problems. Here’s what to watch for:

Digestive upset: Adding too much oil too quickly can cause loose stools, vomiting, or diarrhoea. Dogs’ digestive systems need time to adjust to increased fat intake.

Weight gain: Like all oils, canola oil packs around 120 calories per tablespoon. For a small dog, even a tablespoon daily could lead to significant weight gain over time.

Pancreatitis risk: Dogs prone to pancreatitis should avoid high-fat supplements entirely. The pancreas can become inflamed when processing large amounts of dietary fat, and this condition can be serious. If your dog has a history of pancreatitis, speak with your vet before adding any oil to their diet.

Nutrient displacement: If you’re using canola oil where a more nutrient-rich oil could go, your dog misses out on the specific benefits those alternatives provide.

How Much Canola Oil Can Dogs Have?

If you’re going to use canola oil, keep the amounts modest and introduce it gradually over the course of a week.

Recommended amounts:

Mix it directly into your dog’s food rather than offering it on its own. Start with the lower end of the range and increase gradually, keeping an eye on stool quality and overall digestion.

Remember to factor in the extra calories. If you’re adding oil to your dog’s meals, consider slightly reducing their food portion to maintain a healthy weight.

Healthier Oil Alternatives for Dogs

If you’re looking for the best oil to supplement your dog’s diet, here’s how the most common options compare:

Fish oil (best overall): Provides EPA and DHA directly, the omega-3 fatty acids that deliver the most benefit to dogs. Supports joints, skin, coat, brain function, and may help reduce inflammation. Veterinary nutritionists widely recommend it as the top supplementary oil for dogs.

Coconut oil: Rich in medium-chain fatty acids, particularly lauric acid. Popular for skin conditions, coat health, and dental care. Some owners use it as a topical treatment as well. See our coconut oil for dogs teeth guide for dental applications, or try our coconut oil dog treat recipes.

Olive oil: Less processed than canola oil, rich in antioxidants and monounsaturated fats. Well-tolerated by most dogs and offers cardiovascular benefits in moderate amounts.

Flaxseed oil: The best plant-based omega-3 source, though dogs convert ALA less efficiently than marine-based omega-3s. A good option for owners who prefer not to use animal-derived supplements.

Canola oil: Safe and affordable, but the least beneficial of the group. Use it if it’s what you have to hand, but consider upgrading to one of the above for regular supplementation.

When to Consult Your Vet About Oils

While adding a small amount of oil to your dog’s food is generally safe, there are situations where veterinary guidance is important:

• Your dog has been diagnosed with pancreatitis or is prone to it
• Your dog is overweight or on a calorie-restricted diet
• You notice persistent skin or coat issues that aren’t improving with dietary changes
• Your dog shows signs of a food allergy or sensitivity
• You’re unsure how oils might interact with medications your dog takes
• Your dog has a liver or gallbladder condition

Dietary fat plays an important role in your dog’s health, but getting the balance right matters. Your vet can help you choose the right oil and amount based on your dog’s specific needs, breed, age, and health status.

Canola oil won’t hurt your dog in small amounts, but with better options so readily available, it’s worth making the switch. For more on cooking oils and dogs, check out our guide on soybean oil for dogs to compare another common kitchen oil.