Spinach for Dogs: A Complete Guide
Early wild dogs were facultative carnivores who prioritised meat but scavenged on wild grasses, berries and vegetation when prey was scarce which was more frequent than one might imagine. Attracted to human settlements because of their other waste, spinach would naturally have become part of the canine diet when it was first domesticated in ancient Persia more than 2,000 years ago.
The cultural perception of spinach changed drastically in the early-to-mid 20th century when a scientific error made it appear 10 times more nutritious than it actually was. This error gave rise to the 1930s Popeye the Sailor Man cartoons when spinach was suddenly viewed as the ultimate strength-building superfood. Enticed by the cartoon, pet parents began supplementing their dogs’ diets with spinach, believing it would also give their dogs superior strength and health.
Can dogs eat spinach?
Yes, dogs can safely eat spinach, says our in-house dog nutritionist. Spinach is non-toxic and contains helpful vitamins (A, B, C and K) as well as iron and fibre.
Health benefits of spinach for dogs
Spinach is a highly nutritious addition to any dog’s diet, offering essential vitamins, minerals and antioxidants that support immune health, digestion and circulation. However, because it contains oxalic acid — which can impact kidney function if consumed in massive quantities — it should be served in moderation. Yes, it really is possible to have too much of a good thing!
Key health benefits of spinach for dogs:
- Enhances immunity: spinach is packed with vitamins A and C to help ward off health problems.
- Improves circulation: spinach is rich in iron and folate to aid red blood cell production.
- Supports digestion: the high fibre content in spinach promotes healthy bowel movements.
- Promotes eye health: spinach contains beta-carotene and lutein to maintain good vision.
- Fights inflammation: spinach is loaded with antioxidants that slow down cognitive decline and cell damage.
- Boosts bone strength: the high levels of vitamin K in spinach assist with calcium absorption and blood clotting.
- Regulates body functions: the magnesium and potassium in spinach support nerve functions and heart health.
While spinach is a highly nutritious leafy green, it is exceptionally rich in oxalates (oxalic acid). These natural compounds bind to calcium in the bloodstream, filtering through the kidneys. If fed frequently or in large amounts, they can cause kidney damage or trigger the formation of painful calcium oxalate bladder and kidney stones.
If your dog has a history of kidney disease, bladder stones or belongs to a breed genetically prone to stone formation (such as Miniature Schnauzers, Lhasa Apsos, Yorkies or Bichon Frises), you should avoid feeding them spinach entirely. Opt for lower-risk leafy greens like romaine lettuce or curly parsley instead.
How much spinach can dogs eat?
While spinach is a nutrient-dense superfood packed with essential vitamins and minerals, this is one of those rare ingredients you should feed occasionally and in moderation only as it also contains oxalic acid, which can cause health issues in some dogs if consumed in large quantities.
Other dog-safe vegetables
- Broccoli. Nutrient-dense canine superfood.
- Sweet potatoes
- Carrots
- Green beans. Low calorie, high fibre, vitamin rich.
- Leafy greens
- Parsnips
- Celery
- Beetroot
See the full range of dog-safe vegetables here.
Search Spinach recipes:
The Dog Chef Guide to Homemade Dog Food
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How to feed a dog spinach
Spinach is a dark leafy green packed with iron, calcium, magnesium, potassium and vitamins A, C and K. It offers excellent antioxidant protection, supports eye health, and helps boost the immune system.
Here are four creative, dog-safe ways to incorporate cooked spinach into your dog’s diet:
1. Green Machine Antioxidant Topper
Raw spinach leaves will often pass straight through a dog’s stool completely undigested with all their goodness locked inside. Blending or steaming them ensures your dog actually absorbs the iron and vitamins while adding a rich, rustic glaze to its food.
- Steam a small handful of fresh spinach leaves for 2 minutes until completely wilted. Toss the wilted greens into a blender with 4 tablespoons of warm bone broth.
- Puree until perfectly smooth and let it cool. Pour a ladle of this vibrant green gravy directly over your dog’s regular food to add instant hydration and an enticing, earthy aroma.
2. Frozen Spinach & Kefir Internal Deodoriser Bites
Spinach is exceptionally high in chlorophyll, a natural green plant pigment that acts as a gentle, internal deodoriser to help freshen bad dog breath from the inside out.
- Finely mince a tablespoon of steamed and cooled spinach. Stir the minced greens into 100ml of goat’s milk kefir or Greek yogurt.
- Spoon the green mixture into silicone moulds and freeze for 3 hours. Pop them out as a refreshing summer treat that delivers both iron and gut-healthy probiotics.
3. Sticky Spinach & Pumpkin Boredom Buster
The vibrant green colour and smooth texture of pureed spinach blend seamlessly into starchy bases, creating a complex, visual filling that extends licking time.
- Take 2 tablespoons of cooked and mashed pumpkin or sweet potato. Stir in one tablespoon of your blended cooked spinach puree.
- Use a spatula to press the sticky green paste firmly into the crevices of a rubber lick mat or inside an enrichment toy like a Kong. Freeze flat for 45 minutes before serving to keep your dog calm and occupied during stressful events like grooming.
4. Baked Oatmeal & Spinach Superfood Drops
You can fold finely chopped cooked spinach into a simple biscuit dough to bake a batch of highly rewarding, iron-rich cookies that won’t crumble in your training pouch.
- Finely chop a small tablespoon of steamed spinach. In a mixing bowl, combine the greens with one medium chicken egg and 120g (1 cup) of oat flour.
- Roll the dough into tiny, marble-sized balls and flatten them slightly with a fork onto a parchment-lined baking sheet. Bake at 180°C (350°F) for 20 minutes until golden and crisp. Allow them to cool completely before using.
Frequently asked questions
Q. What are the health benefits of spinach for dogs?
A. Spinach is packed with nutrients that can support your dog’s overall health.
Vitamins A, C, and K support eye health, boost the immune system, reduce inflammation and aid in blood clotting, iron helps produce red blood cells and supports healthy blood circulation, fibre promotes regular bowel movements and a healthy digestive tract and antioxidants help fight free-radical damage which is highly beneficial for ageing or arthritic dogs.
Q. Why are there concerns about feeding dogs spinach?
A. The main concern with spinach is its high level of oxalic acid. Oxalic acid blocks the body’s ability to absorb calcium. Over time, excessive amounts can cause calcium oxalate crystals to form, potentially leading to kidney or bladder stones or even kidney damage.
Q. How much spinach can my dog eat?
A. Individual vegetables and fruits should make up no more than 10 percent of your dog’s total daily food intake. Collectively, they can make up 30 percent of your dog’s overall diet. Our 10 percent guide to homemade dog food will explain in more detail.
Q. Which dogs should not eat spinach?
A. Dogs with kidney disease or a history of urinary issues and puppies under four months old should avoid eating spinach.
Q. Should spinach be raw or cooked for dogs?
A. Cooked spinach is recommended. Raw spinach is difficult for a dog’s digestive tract to break down and contains higher levels of active oxalates.
Q. Can I give my dog seasoned or canned spinach?
A. No. Never feed your dog canned spinach, as it often contains high sodium levels.
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