How a Cat’s Digestion Differs from Dogs and Humans – What Every Pet Parent Should Know
- Jasmine Toh
- Jul 17
- 2 min read

Ever wondered why your cat turns up their nose at leftovers or why they can’t handle certain foods your dog gobbles up? It’s not just about fussiness — your cat’s digestion is biologically different.
In this article, we break down the key differences between feline digestion, canine digestion, and human digestion, and why choosing the right food — like Pawsitive Fuel’s TCM-inspired recipes — makes all the difference.
🧬 1. Cats Are Obligate Carnivores — Dogs and Humans Are Not
The most important difference? Cats are obligate carnivores. That means they require animal protein to survive. Their bodies are built to process meat — not grains, starches, or plant-based diets.
What this means:
Cats lack certain enzymes to digest carbs efficiently
They must get taurine, vitamin A, and arachidonic acid from meat
They don’t produce enough amylase (a carb-digesting enzyme)
By contrast:
Dogs are omnivores and can digest a mix of meat and plants
Humans are highly adaptive omnivores with strong digestive enzymes for carbs, fibre, and plants
🕐 2. Cats Have a Shorter Digestive Tract
Cats have a relatively short gastrointestinal tract, meaning food passes through quickly. They don’t ferment fibre or break down complex carbs well.
What this means:
They extract nutrients primarily from protein and fat
Carbohydrate-rich diets may cause bloating or digestive issues
Easily digestible, high-meat-content food is ideal
💧 3. Cats Are Not Natural Water Drinkers
In the wild, cats get most of their hydration from prey. Unlike dogs, cats don’t instinctively drink a lot of water, even when their body needs it.
What this means:
Wet food is essential for hydration
Dry kibble diets may increase risk of kidney or urinary issues
High-moisture, meat-based diets like Pawsitive Fuel support urinary tract health
🧪 4. Cats Are Sensitive to Food Quality & Additives
Cats have strong preferences and sensitive systems. Poor-quality ingredients, fillers, or preservatives can easily lead to digestive upset, vomiting, or diarrhoea.
By contrast:
Dogs have more robust digestive systems
Humans can tolerate a wide variety of food additives and ingredients
Cats thrive best on diets that are simple, high in quality protein, and free from artificial additives.
🍲 What to Feed Instead: Pawsitive Fuel’s TCM-Inspired Recipes
At Pawsitive Fuel, we’ve crafted recipes specifically for feline digestion — not canine, and definitely not human.
✔️ Human-grade chicken and salmon✔️ No grains, no fillers, no preservatives✔️ Gently cooked for maximum digestibility✔️ TCM herbs like goji berries, milk thistle, cranberries, and ginseng to support immunity, digestion, and recovery
❌ Don’t Assume Cat and Dog Food Are Interchangeable
Giving your cat dog food — even temporarily — may cause:
Nutritional deficiencies (esp. taurine)
Digestive upset
Long-term organ damage if continued
Always choose species-appropriate food.
🐾 Final Meow: Choose What’s Right for Their Tummy
Cats aren’t small dogs. They’re unique animals with unique digestive needs — and they deserve a diet that respects that.
With Pawsitive Fuel, you’re feeding them the way nature intended — clean, nutritious, protein-first meals with a TCM twist for total wellbeing.
📦 Ready to nourish your cat from the inside out?
👉 Shop now 📱 Follow us @pawsitive.fuel on TikTok and Instagram



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