Biotic's Gain

Mostly smell, moisture and fat — in roughly that order, and long before taste gets a look in. A dog has an enormous sense of smell and only around a sixth of the taste buds a person has, so a bowl is judged at the nose first and the tongue second. Wet food tends to win that first test because warmth and water carry aromatic compounds into the air, while dry food sits cooler, drier and quieter. Fat comes next, since it holds most of the smell and gives the mouthfeel dogs seem to gravitate towards. Texture and temperature finish the job. None of this makes wet food better than dry — it makes it easier to notice, which is a very different thing.

The first article in this series, Is My Dog a Fussy Eater, or Have We Made Them One?, looked at how fussiness is learned. This one looks at what a dog is responding to when they walk away from one bowl and clear another.

The nose decides before the mouth does

People pick food with their eyes and then taste it. Dogs do neither. A dog’s olfactory equipment dwarfs ours while their taste apparatus is modest — they register sweet, sour, salty and bitter, plus a sensitivity to water we do not have, but they are not writing a tasting note. By the time the mouth is involved, the decision has largely been made at the nose.

That single fact explains most of what owners interpret as fussiness. A dog who turns away from a bowl has usually not tasted it. They have smelled it, found it unremarkable, and gone to lie down. Nothing about the food’s quality is being judged, because a dog has no way of judging it. Only its aroma is.

What moisture actually changes

Aroma compounds are volatile: they have to leave the food and reach the air to be smelled at all. Water and warmth both help them do that, which is why a tin opened at room temperature announces itself across a kitchen and a scoop of kibble does not. Wet food typically runs around 75-80% moisture against 8-10% in a dry one, so it is arriving with the volume turned up.

Moisture changes the mouth too. Wet food is softer and needs less chewing, which matters more than owners expect for dogs with worn teeth, missing teeth or sore gums. A dog who has quietly started finding kibble uncomfortable looks exactly like a dog who has become picky.

Fat, and why an open bag goes quiet

Fat carries most of the smell in any food, and it is also the first thing to degrade. Dry food is sprayed with fat after it is made, precisely because that coating is what makes it smell of anything. Exposed to air, warmth and light, that fat slowly oxidises and the aroma fades — and the dog notices long before you do.

This is behind a very common pattern: a dog eats a new bag happily for a fortnight, then starts leaving it. Nothing changed about the recipe — the bag has simply been open for two weeks in a warm kitchen. The fixes are dull and effective. Buy a bag size your dog gets through in three or four weeks; keep the food in its original bag rather than decanting it into a bin, because the bag has a barrier layer the bin does not; roll the top down and clip it; store it somewhere cool and dark. Wash the container occasionally too, since old fat residue on plastic goes rancid and taints the fresh food poured on top.

Temperature and the thirty-second difference

Food straight from the fridge smells of very little. Warming it to around body temperature releases the volatiles again, which is why a half-tin that was refused cold is often eaten without comment after a short spell out of the fridge or a splash of warm water stirred through. Warm water works on dry food for the same reason, and has the side benefit of adding moisture for a dog who drinks less than you would like.

Two cautions. Do not microwave food in a way that leaves hot spots, and check the temperature yourself before it goes down. And once food has been warmed or wetted it spoils quickly, so lift anything uneaten after twenty minutes rather than leaving it out all afternoon — stale food in a bowl teaches a dog that the bowl is uninteresting, which is the opposite of what you want.

Texture, habit and what a dog gets used to

Beyond smell, dogs do form real texture preferences, and most are set early. A puppy weaned onto a soft, moist diet often keeps a preference for it; a dog raised on kibble frequently finds wet food oddly slimy at first. Neither is a verdict on the food. It is familiarity, and it shifts slowly in either direction if there is reason to move it.

Which brings up the trap. If a dog hesitates over dry food and a spoon of something wet appears on top within the minute, you have not solved a preference — you have taught one. Do it four evenings running and the dog is no longer eating dry food; they are waiting. That feedback loop is the most common way an ordinary dog becomes a difficult one.

So should you switch to wet?

Not automatically. Both formats can be sold as a complete food, meaning they are formulated to supply everything a dog needs from that one product — the label says “complete” if so and “complementary” if not. Wet food is easier to smell, easier to eat and higher in moisture. Dry food is cheaper per day, keeps longer, is far easier to measure accurately and gives the teeth more mechanical work. Plenty of owners settle on a mix, which is fine as long as the total is portioned as one day’s food rather than two meals’ worth.

Whatever you choose, change it slowly. A sudden switch is a reliable route to loose stools and wind for reasons we set out in Why Does Changing Your Dog’s Food Upset Their Stomach?, and a week to ten days of gradual mixing avoids nearly all of it.

Where the chews come in

Biotic’s Gain 25-in-1 Multivitamin Soft Chews are a complementary feed, not a food and not a medicine. A complementary feed is given alongside a complete diet rather than in place of one, and cannot claim to treat, prevent or cure anything — including a poor appetite. A pack holds 120 soft chews and lasts roughly four months depending on the size of the dog, fed to the guide on the pack. They sit beside the meal as a daily routine; they are not a fix for one and are not sold as one.

When a preference is not a preference

Everything above assumes a well dog with an opinion. Book an appointment with your vet, rather than adjusting the menu, if your dog:

• has eaten nothing at all for 24 hours, or noticeably less for several days
• approaches the bowl keenly and then backs off, drops food, chews on one side or paws at their mouth
• is losing weight, or their coat or energy has changed alongside the appetite
• is being sick, has ongoing loose stools, or is drinking far more or less than usual
• is a puppy, a very small breed, elderly, underweight or on a medically managed diet — these dogs should not be left to go hungry to make a point

Speak to your vet before adding any supplement to your dog’s routine, particularly if they are on medication, pregnant or being treated for anything. A change in appetite is one of the earliest signals a dog gives that something is wrong, and it deserves a professional opinion rather than a different flavour.

More on mealtimes and picky dogs on our fussy eater guide.

Biotic’s Gain chews are a complementary feed for dogs, not a medicine, and are not intended to diagnose, treat, cure or prevent any condition. Feed alongside a complete and balanced diet and follow the feeding guide on the pack. If your dog is unwell, pregnant, on medication or under veterinary care, speak to your vet before adding any supplement.