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Nutrition, Feeding and Prescription Diets

Food advice should start with the pet in front of us

There is a lot of confident nutrition advice in the world, but the useful answer for a dog or cat depends on age, species, body condition, appetite, medical history, medications, stool quality, urinary signs, dental comfort, activity and what the household can actually feed consistently.

A diet can be excellent on paper and still be the wrong fit for a pet who will not eat it, gains weight on it, vomits on it, cannot chew it, develops urinary problems or needs a medical condition managed more carefully.

The amount matters as much as the brand

Feeding guides are a starting point, not a verdict. Desexing, age, breed, activity, treats, dental chews, table food, body condition and weight goals can all change how much a pet should receive.

Small extras can become a large part of daily calories. A weight conversation often starts by counting the normal food honestly, then adding treats, chews, training rewards and anything shared by different family members.

Life stage changes the answer

Puppies, kittens, adult pets, senior pets and pets with chronic disease do not need the same feeding advice. Growth, muscle maintenance, dental comfort, kidney health, urinary signs, body condition and medication can all change what good nutrition looks like.

A diet that suited a young healthy pet may not suit the same pet later in life. Rechecking food choices is sensible when weight, thirst, appetite, stool, skin, coat, mobility or blood results change.

Appetite changes are health information

A fussy pet may simply have learned preferences, but appetite change can also reflect dental pain, nausea, fever, stress, kidney disease, gut disease, medication effects or pain. Cats in particular should not be left without food for prolonged periods.

Tell us what your pet will eat, what they refuse, whether texture matters, whether thirst or toileting changed, and whether vomiting, diarrhoea, weight loss or mouth signs are present. The food story often points toward the health story.

Treats and supplements are part of the diet

Dental chews, training treats, toppers, bones, table food, supplements and human snacks can affect calories, gut signs, urinary plans and food trials. They are not separate from nutrition just because they are not in the main bowl.

If a medical diet is being used, ask which extras are compatible. A small daily treat may be fine for one condition and unhelpful for another.

Prescription diets are treatment tools

Prescription diets are not just premium food with a different label. They are formulated to support specific medical goals, such as kidney disease, urinary stone risk, digestive disease, food-responsive skin or gut signs, weight loss or recovery.

They work best when the diagnosis, goals and monitoring are clear. Mixing diets, adding many extras or stopping too early can reduce the benefit, while a pet who refuses the diet may need a different way to reach the same medical aim.

Medical diets need follow-up

A prescription diet should usually have a reason and a way to check whether it is helping. That might be weight trend, urine results, kidney values, stool quality, vomiting frequency, itch control or appetite.

If your pet is refusing the food, losing too much weight, gaining weight, vomiting, developing diarrhoea or scavenging constantly, the answer is not simply to persist in silence. The diet may need adjustment.

Food changes should be deliberate

Some pets tolerate a food change easily. Others develop vomiting, diarrhoea, refusal or flare-ups when the change is too sudden or when several new foods and treats are introduced at once.

A deliberate transition makes it easier to see whether the new food suits your pet. If a diet is being used as a medical trial, the details matter even more because unplanned extras can blur the result.

Raw and home-prepared feeding need careful discussion

Raw and home-prepared diets can create two different sets of questions: whether the diet is nutritionally complete for the pet, and whether the food-safety risk is acceptable for the pet and the household.

Young pets, senior pets, immunocompromised people, pregnant people and households with small children may need extra caution. If you want to feed a non-commercial or raw diet, it is worth discussing balance, hygiene, storage, bones and realistic monitoring.

Feeding during illness, recovery or old age

Unwell and recovering pets may need softer textures, smaller meals, nausea control, appetite support, pain relief, syringe-feeding advice or a temporary diet. Older pets may need attention to muscle, kidney values, dental comfort, weight and medication timing.

The goal is not to chase a perfect food label while the pet is uncomfortable. It is to keep nutrition safe, acceptable and connected to the medical problem being treated.

A food history helps avoid guesswork

Before changing food, it helps to know what your pet currently eats, how much, how often, what treats are used, whether multiple pets share bowls, and who in the household feeds extras. Photos of labels or measuring cups can be surprisingly helpful.

That history can reveal why weight is changing, why a food trial failed, why a prescription diet is not working as expected, or why a pet seems hungry despite being fed plenty of calories. It also helps us give advice the household can actually follow.

Feeding and diet topics to start with

Choosing Food for Dogs and Cats

How to choose a diet around life stage, health, body condition, appetite and reliable feeding information.

Choosing Food

How Much Should I Feed?

Why feeding amounts need to include body condition, treats, activity, age, desexing status and weight goals.

Feeding Amounts

Fussy Eaters and Appetite Changes

How to separate normal preference from nausea, dental pain, stress, illness or medication effects.

Appetite Changes

Switching Food Safely

How to change food deliberately so gut upset, refusal and confusion are less likely.

Switching Food

Kidney Diets for Dogs and Cats

How kidney diets can support pets with kidney disease and why timing, acceptance and monitoring matter.

Kidney Diets

Urinary Diets and Bladder Health

Why some bladder and stone problems need diet, water intake, urine monitoring and follow-up together.

Urinary Diets

Digestive Diets and Sensitive Stomachs

How diet trials may support vomiting, diarrhoea, sensitive stomachs or chronic gut signs when chosen carefully.

Digestive Diets

Weight-Loss Diets and Satiety

Why weight-loss diets are designed to protect nutrition while reducing calories and helping pets feel fuller.

Weight-Loss Diets

Puppy and Kitten Nutrition

How growth diets, feeding amounts, treats and body condition set foundations for young pets.

Puppy and Kitten Food

Senior Pet Nutrition

How feeding needs can change with age, muscle loss, dental disease, kidney changes, arthritis or chronic illness.

Senior Nutrition

Raw Diets and Food Safety

Why raw feeding needs a clear conversation about infection risk, nutritional balance and household safety.

Raw Diets

Treats, Calories and Dental Chews

How treats, chews and extras can help or quietly undermine weight, dental and digestive goals.

Treats and Chews

Feeding During Illness or Recovery

How appetite support, texture, nausea, medication and recovery instructions fit together when pets are unwell.

Feeding During Illness

Nutrition Evidence and Decision-Making

A client-friendly summary of how nutrition guidance changes practical feeding choices.

Nutrition Evidence

Talk to us about food, weight or prescription diets

If you are unsure what to feed, how much to feed, whether a prescription diet is still needed, or whether appetite change is a medical sign, we can help make the conversation practical.

Bring the food name, amount fed, treats, chews, supplements, appetite changes, stool or urine changes, current medication and any health conditions already diagnosed.

Contact Us

Related Pages

Weight Management

Weight plans work best when feeding amounts, treats, activity and medical causes are considered together.

Weight Management

Urinary, Kidney and Bladder Care

Diet can be part of kidney and bladder care, but urine testing and monitoring still matter.

Urinary and Kidney Care

Vomiting and Diarrhoea

Digestive signs may need food changes, but testing, hydration and medical causes can matter too.

Digestive Care

Dental Care and Dentistry

Dental pain can change chewing, food preference and appetite before owners see obvious mouth signs.

Dental Care

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Christchurch
Canterbury 8041
New Zealand