The ManyPets guide to sustainable pet food

7 June 2021 - 5 min read

As doting pet parents, we treat our four-legged friends like VIPs (that’s Very Important Pets, of course). From mealtime to playtime to bedtime, we make sure they have everything they need to live their happiest, healthiest lives.

Unfortunately, taking care of pets takes a huge toll on the environment. Pet supplies create a significant carbon footprint, negatively impacting the habitats and survival of other animals. But the biggest factor in this climate conundrum? Dog and cat foods, which require large amounts of resources to produce.

Of course, high-quality food is non-negotiable when it comes to pet parenting. But there are some climate-pawsitive changes you can make to your pet’s diet without compromising your companion’s health.

How does pet food affect the environment?

Dog with carrot

So what makes pet food so problematic? In a word, meat.

Most pets have a meat-based diet, which requires a lot of land, energy, and water to produce. In fact, a 2021 study revealed that global greenhouse gas emissions from animal-based foods are twice those of plant-based foods - accounting for 57% of all food-based emissions.

Another study that was carried out in 2017 by UCLA researchers suggested that cats and dogs are responsible for up to 30% of the environmental impact of meat consumption in the United States. Our carnivorous pets contribute 64 million tons of carbon dioxide annually, which is the equivalent of 13.6 million cars driving for a year.

Feeding your pet: environmentally-friendly tips & changes

Ready to make some climate-pawsitive changes to your pet’s diet? Consider the following advice from the experts.*

*Always consult your veterinarian before changing your pet’s food! Some pets need specific diets for medical conditions or life stages, and eco-friendly alternatives may not be appropriate. Additionally, changes should be made slowly and under the guidance of your vet to avoid gastrointestinal upset.

Don’t buy into meat marketing hype

Many premium pet foods proudly boast that they’re made with only choice cuts of meat and without animal “byproducts.” Although these claims are certainly appealing to well-meaning pet parents, the truth is that there’s nothing wrong with “byproducts” – in fact, these less desirable animal parts are nutritious, practical, and environmentally savvy.

By choosing a pet food that contains byproducts, you’ll save perfectly edible ingredients from the landfill while reducing the need for more livestock.

Pets and global warming

Consider Plant-Based Dog Food

If you stick to a vegetarian or vegan diet, you may be interested in exploring the same for your pet. So is it possible? Maybe, depending on your pet.

“There is a growing body of evidence that dogs can live long and healthy lives on a vegetarian diet – even sporting dogs,” says Dr Joanna Woodnutt, MRCVS.

Before feeding your dog a plant-based diet, consult your veterinarian. The food you select should contain added methionine, an essential amino acid found in meat, adds Woodnutt.

Cats, on the other hand, are “obligate carnivores,” meaning their bodies simply need the unique nutrients found in meat. Specifically, cats require taurine, an amino acid found in meat that cannot be easily replicated.

“While there is synthetic taurine, bioavailability appears to be poor,” says Woodnutt. “I would urge pet owners not to switch their cat to a meat-free diet until we know more.”

Skip carbon-heavy proteins

Not all protein is created equal. After accounting for land use, irrigation water, and greenhouse gas production, researchers at Yale found that raising beef requires 10 times more resources than poultry, dairy, eggs, or pork.

When selecting a pet food, skip recipes made from beef and opt for a more eco-friendly protein. While chicken is popular, a less traditional source is creating quite the “buzz”.

“Products made out of edible insects are the latest innovation in terms of sustainable pet food,” says Ochoa. “They’re extremely nutritious, and have very low greenhouse emissions in the production – nearly 96% less than beef products.”

Dog with bowl of food

Buy eco-friendly pet food brands

Studies have shown that 66% of consumers are willing to spend more for sustainable brands – and the pet food industry has taken note. From low-carbon foods to bowls made from recycled plastic, there are a number of eco-conscious pet products available these days.

“Choosing environmentally conscious pet food producers is a great step ahead,” says Casper Ohm, senior research scientist at “For instance, Pure Pet Food uses fully recyclable packaging, while Wild Earth produces 100% plant-based dog food.”

And the number of options are growing. A 2021 study showed that the number of pet food products containing Marine Stewardship Council (MSC)-certified sustainable seafood has grown by 57% in the UK during the previous five years

While many of these foods have a higher price tag, if there’s room in your budget, consider it an investment in the earth. “We are in charge of the environmental impact of our pets' eating habits just as much as we are of our own,” says Ohm.

How much should I feed my pet?

When rethinking your pet’s diet, it’s always a good idea to make sure you’re giving the appropriate portions. Keeping your pet at their ideal weight will help ensure a longer, happier life. (Plus, when you avoid overfeeding, you cut back on your pet’s carbon pawprint!)

A number of factors will influence how much you should feed your pet:

  • Species: Cats and dogs require species-specific foods and portions.

  • Breed: Different breeds will have different energy requirements.

  • Age: Puppies, kittens, nursing animals, and senior cats require additional calories and special formulations.

  • Size: Larger breeds require more calories.

  • Activity level: Lap dogs will generally need fewer calories than working dogs.

  • Health conditions: Many health conditions can affect caloric needs.

Calorie calculators such as those developed by the Pet Nutrition Alliance can serve as general guidance. However, each pet is unique, so review your portion plan with your veterinarian.

Dog at vending machine

Pet food sustainability: staying climate-positive

If you’re an animal lover, it’s easy to become overwhelmed – and maybe even pessimistic – when researching how to care for both your pets and the environment. But there’s no need to feel guilty or discouraged.

“Pets are a huge part of our lives, and the joy and unconditional love they bring to us is second to none,” says Ochoa. “Even though our pets’ carbon footprint is high, you don’t have to resort to extreme measures. There are quite a number of healthy, convenient, and environmentally-friendly courses of action to take.”

Who’s a good pet parent? You are!

Monica has written for a variety of brands and publications, including Martha Stewart Living, Anthropologie, and pet-friendly outlets including Petco, Chewy, and ManyPets.