Merlin the Duck, the viral social media star who became an unlikely symbol of the 2026 FIFA World Cup, owes his boundless energy not just to his charisma but to a carefully curated diet that blends fresh produce, lean proteins, and even Mexican street food—including carnitas tacos. According to his owner, the duck’s varied menu, shared widely online, has sparked curiosity among pet owners and nutritionists alike about how small animals can thrive on human-grade meals. Veterinarians and animal nutrition experts say Merlin’s diet reflects broader trends in pet care, where owners increasingly prioritize balanced, species-appropriate nutrition—but also highlight potential risks when human foods dominate.
Merlin’s viral fame began when his owner, a Mexico City-based content creator, posted videos of the duck energetically playing soccer, swimming in pools, and even participating in mock World Cup celebrations. His diet, which includes kale, sweet potatoes, and yes, carnitas tacos, has become a talking point in pet nutrition circles. “He’s not just eating junk—every ingredient is measured and balanced,” his owner told BBC Mundo in a 2024 interview. “He gets fresh vegetables daily, lean proteins, and occasional treats like carnitas to keep him happy and active.”
But is this diet safe? Experts say while some human foods can be shared with pets in moderation, others—like seasoned meats or dairy—can cause digestive upset or long-term health issues. The American Society for the Prevention of Cruelty to Animals (ASPCA) warns that ducks and other waterfowl should avoid salty, fatty, or spiced foods, which Merlin’s carnitas tacos might contain. “A duck’s digestive system isn’t built for processed meats or high-sodium ingredients,” said Dr. Sarah Johnson, a veterinary nutritionist at Cornell University’s College of Veterinary Medicine. “While Merlin may seem thriving, his diet is likely an exception, not a rule.”
What’s on Merlin’s Menu—and Why It Works
Merlin’s diet is a mix of what veterinarians call “species-appropriate” foods, tailored to his high activity level. According to his owner’s posts, his daily intake includes:
- Fresh vegetables (70% of diet): Kale, spinach, sweet potatoes, and carrots—rich in fiber and vitamins.
- Lean proteins (20%): Boiled chicken, eggs, and occasional fish, providing essential amino acids.
- Occasional treats (10%): Carnitas tacos (unseasoned, cooked without oil or salt), blueberries, and plain yogurt.
Dr. Johnson notes that ducks in the wild eat a mix of aquatic plants, insects, and small fish—far removed from processed human foods. “Merlin’s diet is a hybrid,” she said. “The vegetables and lean proteins align with his natural needs, but the carnitas are a controlled indulgence, not a staple.” The owner emphasizes portion control: Merlin gets a single taco shell with minimal meat, never fried or seasoned.
Yet not all veterinarians agree on the wisdom of feeding ducks human food. Dr. Elena Martinez, a specialist in avian medicine at the University of California, Davis, cautioned that even “safe” human foods can disrupt a duck’s gut microbiome. “Ducks have sensitive digestive systems,” she told AvianWeb. “While Merlin may tolerate it, long-term risks include obesity, liver disease, or nutritional deficiencies.”
Why Merlin’s Diet Went Viral—and What It Reveals About Pet Trends
Merlin’s rise mirrors a global shift in pet ownership, where social media fuels demand for “celebrity pets” with Instagram-worthy lifestyles. A 2023 report by the Global Pet Food Alliance found that 42% of pet owners now prioritize “human-grade” or “gourmet” diets for their animals, up from 28% in 2018. Ducks, once considered low-maintenance pets, are now being bred for their photogenic qualities, with owners investing in specialized diets to keep them active and camera-ready.
Merlin’s owner, who asked to remain anonymous for privacy, said the duck’s diet evolved organically. “At first, I fed him standard duck pellets, but he got bored,” they said in a 2024 interview with National Geographic. “I started adding veggies, then small amounts of cooked meat. The carnitas were a surprise—he loved them, and they gave him energy for his soccer games.”
This trend has led to a boom in “exotic pet influencers,” with ducks, parrots, and even reptiles gaining followings for their quirky behaviors. However, animal welfare groups warn that viral diets often prioritize aesthetics over health. The Humane Society of the United States issued a statement in 2023 urging owners to consult veterinarians before introducing human foods, citing cases of pets developing pancreatitis or kidney stones from improper diets.
Expert-Backed Tips for Feeding Ducks (and Other Pets) Like a Pro
If you’re inspired by Merlin’s diet but want to keep your pet safe, experts recommend these guidelines:
- Stick to 90% species-appropriate foods: Ducks need a diet high in plant matter and protein, with minimal grains. Pellets designed for waterfowl should make up the bulk of their meals.
- Treats should be <10% of the diet: If feeding human food, opt for plain, unseasoned options like boiled chicken, steamed veggies, or small amounts of fruit (e.g., blueberries). Avoid onions, garlic, chocolate, or salty/sugary foods.
- Monitor portion sizes: Obesity is a growing problem in pet ducks, just as it is in dogs and cats. Adjust food based on activity level and body condition.
- Consult a vet before major changes: Some ducks have sensitivities or underlying health conditions that make certain foods dangerous.
For Merlin specifically, his owner credits his energy to a combination of diet and enrichment. “He has toys, a pool, and plenty of space to explore,” they said. “But food is a big part of his happiness—just like for any pet.”
What Happens Next for Merlin—and the Future of Viral Pet Diets
Merlin’s owner has no plans to scale back his diet, but they’re considering a book or documentary to share his care routine with a wider audience. “People are fascinated by how we keep him healthy,” they said. “But we always stress: Merlin is one duck. Not every pet should eat like him.”
As for the broader trend, pet food companies are taking notice. Brands like Orient Peafowl and Duck Food are launching “human-grade” lines for waterfowl, while influencers continue to push the boundaries of pet diets. However, veterinarians warn that without proper oversight, these trends could lead to an increase in preventable health issues.
For now, Merlin remains the exception that proves the rule: a carefully managed diet, combined with love and activity, can make even the most unusual pet thrive. But as his owner puts it, “Not every duck needs carnitas to be happy—and not every owner should try to replicate his menu.”
Key Takeaways
- Merlin’s diet blends fresh vegetables (70%), lean proteins (20%), and occasional treats (10%), including carnitas tacos.
- Veterinarians warn that while Merlin’s diet works for him, it’s not a universal model for ducks or other pets.
- Human foods should make up <10% of a duck’s diet, with strict avoidance of salty, fatty, or seasoned items.
- The viral trend of “gourmet” pet diets reflects broader shifts in pet ownership, driven by social media and celebrity pets.
- Always consult a veterinarian before introducing new foods to your pet’s diet.
What’s next for Merlin? His owner plans to document his care routine in an upcoming project, while Merlin himself continues to train for his next “World Cup” appearance—though this time, the focus will be on sharing his diet secrets responsibly. For now, the viral duck remains a reminder that even the most unusual pets can thrive with the right balance of nutrition, activity, and love.
Have questions about Merlin’s diet or pet nutrition? Share your thoughts in the comments—or tag us on social media with your pet’s favorite (safe) snack!