How to Spot Food Sensitivities in Your Cat or Dog (and Find a Protein That Works)

Itchy paws they won't stop licking. Ears that are always a little red. A sudden 3am vomit. Gas that clears a room. Poo that's more loose than firm for weeks on end.

Any of these sound familiar?

If your cat or dog is showing these signs and you've already ruled out fleas, ticks, and a dodgy treat, there's a good chance their body is reacting to something in their food. The most common culprit is a specific protein. And the good news is you don't need a lab to figure out which one.

Here's the honest guide to how food sensitivity works in pets, what actually helps, and how to use a simple 2-week rotation to find a protein your furkid thrives on.

Allergy, sensitivity, or intolerance? They're not the same thing

This is the first place most advice online goes wrong. "Food allergy" gets used as a catch-all, but there are three different things happening and only two of them can be managed at home.

True food allergy. An immune-system response (IgE or cell-mediated) to a specific protein. It's actually rare, think 1-2% of pets. Symptoms can be intense: chronic itch, hot spots, stubborn ear infections, sometimes GI upset. The only reliable diagnosis is a vet-prescribed elimination diet using a hydrolysed protein or a single novel-protein formula, run strictly for 8-12 weeks with zero off-plan treats. Blood tests and skin tests for food allergies are famously unreliable in pets.

Food sensitivity. A non-immune adverse reaction. More common. Shows up as itch, ear gunk, paw licking, loose stool, dull coat, gas. At-home rotation can usually identify the trigger.

Food intolerance. A digestive-only reaction. Gas, vomit, diarrhoea from an ingredient the gut can't process well (lactose in some cats, high-fat foods in some dogs). Rotation helps here too.

For the rest of this guide, "sensitivity" is shorthand for the second two. If you're dealing with severe symptoms, skip to the vet section below. Everyone else, keep reading.

When you should skip DIY and call the vet first

We want to be useful, not replace your vet. Please see a vet first if:

• There's blood in stool or vomit
• Severe skin lesions, open wounds, or hot spots that won't heal
• Weight loss, lethargy, or loss of appetite
• Symptoms came on suddenly and severely
• You've already been trying diet changes for 4+ weeks with no pattern

A vet can run blood panels, rule out parasites and environmental allergies, and prescribe a proper hydrolysed-protein diet if needed. Food is one variable. Sometimes it's the wrong variable to be changing.

For mild-to-moderate symptoms where you suspect diet is involved, the at-home method below is a cheap, low-risk way to gather real data.

The "find their protein" method

Single protein at a time. Two full weeks. Daily notes. That's the whole thing.

Step 1: Pick one protein to start. We recommend starting with a novel one (more on that in the next section). If you haven't rotated before, kangaroo for cats and kangaroo or pork for dogs are low-exposure bets for most SG pets.

Step 2: Feed only that protein for 14 days. No chicken treats, no fish-flavoured dental sticks, no pilfering from the human plate. Sensitivity trials die on the altar of "one little nibble won't matter." It matters.

Step 3: Keep a 5-point journal. Daily, same time. Score each from 1 (bad) to 5 (great):

• 💩 Poo quality (firm, formed, consistent colour)
• 🐾 Itch level (paw licking, scratching, head shaking)
• ⚡ Energy (playful, responsive)
• ✨ Coat (shiny, not flaky)
• 🍽️ Appetite (eats their meal, not hesitant)

A sticky note on the fridge is fine. Memory lies, written notes don't.

Step 4: At day 14, read the trend. If the scores are clearly trending up and symptoms are calmer, you've found a winner. You can settle there, or rotate through others later for variety while knowing this one works.

Step 5: If no improvement, move to the next protein. Same 2-week window, same journal. Don't switch mid-trial.

Step 6: Transition gently between proteins. A 3-5 day gradual handover (25% new / 75% old, then 50/50, then 75/25, then 100% new) prevents digestive upset that can look like sensitivity but actually isn't. More on transitions further down.

Why "novel protein" matters

Chicken and beef are in nearly every commercial pet food on the shelf. The immune system, over time, learns to react to what it has seen most. A protein your pet has never been exposed to (a "novel" protein) is less likely to trigger a reaction that's already in the system.

For most Singapore pets, chicken and beef are high-exposure. Lamb is moderate. The cleaner starting points:

• For cats: Kangaroo, duck. Both are low-exposure in typical SG diets.
• For dogs: Kangaroo, pork, fish. Pork is our newest and one of the lowest-exposure options in the SG market.

This is part of why our range exists. We built kangaroo into both the cat and dog lineup early on, and we added pork for dogs specifically because sensitive pups needed something beyond the usual suspects.

Quick reference: our proteins

Protein	Cat (200g)	Dog (300g)	Exposure in typical SG diets
Chicken	$7.10	$8.60	Very high. Suspect first if on kibble.
Beef	$9.00	$9.70	High.
Kangaroo	$11.90	$13.30	Low. Strong starter for rotation.
Duck	$8.70	n/a	Low for cats.
Pork	n/a	$8.80	Low. Great for sensitive dogs.
Fish	n/a	$13.30	Moderate. Different fat profile.

Every recipe is PhD-formulated to AAFCO All Life Stages standards, sous vide cooked at 80°C (never extruded, never over-heated), and made in our kitchen at Pioneer. Full formulas are public on our open-source spreadsheet: ratios, supplements, everything.

Transitioning without making things worse

The fastest way to undo a sensitivity trial is to switch too fast. Your pet's gut needs time to adjust to new proteins and new cooking styles. Use a 3-5 day gradual swap:

• Day 1-2: 25% new / 75% current food
• Day 3: 50 / 50
• Day 4: 75% new / 25% current
• Day 5: 100% new

For portions, our feeding calculator will size meals by weight and activity. Baseline rules of thumb:

• Adult cats: 65g × 2 meals/day (plus around 10g kibble if you're mixing). On gently cooked only, add 5-10g per meal.
• Kittens: 65g × 3 meals/day.
• Adult dogs: around 3-4% of body weight per day, split across 2 meals.

Never heat our food. Sous vide cooking preserves taurine and heat-sensitive vitamins. Microwaving degrades them. Thaw in the fridge overnight, serve room-temp or cool.

What improvement actually looks like

If rotation is going to help, here's the rough timeline:

• Week 1: Less scratching, firmer poo, fewer mid-air farts
• Week 2-3: Coat gets shinier, ear gunk reduces, less paw licking
• Week 4+: New baseline. Calmer gut, quieter skin, better energy

This isn't magic and it isn't instant. It's biology catching up. If you're at day 14 and symptoms have actively worsened (not just failed to improve, but gone backwards), stop and move to the next protein, or book a vet visit.

Common mistakes we see

1. Switching too fast. That's transition GI upset, not a sensitivity signal. Give it the 3-5 days.
2. Giving up at day 5. Two weeks minimum. The body needs the window.
3. Trialling multiple new proteins at once. You lose the signal. One at a time.
4. Keeping treats and kibble on the side. A single chicken treat breaks a kangaroo trial.
5. Not journaling. Memory smooths out the hard days and you'll forget whether week 1 was actually better. Write it down.

When to escalate back to the vet

If after 4 weeks and 3 different proteins you still see no pattern, it's time for professional help. The culprit might not be protein at all. Common alternatives:

• Environmental allergens (dust mites, pollen, grass)
• Storage-mite contamination in dry food
• Parasites (giardia, hookworm, fleas)
• Skin conditions unrelated to diet

A vet can run the right tests and prescribe what's needed. We'll still be here when they come back.

FAQ

Q: Can I do this while my pet is still eating kibble?

You can, but it muddies the signal. A clean gently-cooked-only trial gives the sharpest read. If you're not ready to fully switch, at minimum remove treats and toppers with unrelated proteins during the trial window.

Q: Is 2 weeks really enough?

For mild-to-moderate sensitivities, yes. For suspected true allergies (IgE-mediated), the vet-prescribed 8-12 week protocol is the standard. 2 weeks won't give you that.

Q: Which protein should I start with?

The one your pet has had the least exposure to. For most SG pets that's kangaroo. If they've only ever had chicken kibble, any of our non-chicken options is a valid starting point.

Q: Should I use a trial pack or single packs to start?

Our mix trial packs were built for exactly this. You get every protein in one order, enough to run a rotation without placing new orders mid-experiment.

Ready to start? Our mix trial packs are the fastest way in

Prefer to dip in with a single pack first? Grab a free cat trial pack or free dog trial pack (chicken or beef, on us, $9 cold-chain delivery). You can always upgrade to the mix later.

Whichever way you start, journal the 5 points daily. Your furkid will tell you the answer. Your job is just to catch it. 🐾

❤️ The Bon Pet team

Frequently asked questions

How long does a food sensitivity trial take to show results?

Give each protein a full 14 days with zero off-plan treats. If scores on poo, itch, energy, coat, and appetite are clearly trending up by day 14, you've likely found a protein that works. No improvement? Move to the next protein and run another 2-week trial.

What's the best novel protein for sensitive pets in Singapore?

For cats, kangaroo and duck are low-exposure starting points. For dogs, kangaroo, pork, and fish are solid picks, with pork being one of the newest and lowest-exposure proteins in the SG market. Chicken and beef are in almost everything on the shelf, so they're not ideal for a sensitivity trial.

When should I see a vet instead of trying diet rotation?

Skip DIY and call your vet if there's blood in stool or vomit, severe skin lesions or hot spots that won't heal, weight loss, lethargy, or sudden severe symptoms. Also see a vet if you've been changing diets for 4+ weeks with no clear pattern. True food allergies need a vet-prescribed elimination diet.