One of the things I love about Within wet food is how much thought has gone into something that most pet food brands barely think about at all: the packaging.

I know that sounds like an odd place to start a blog about nutrition. But the format of a food, how it is portioned, how you serve it, how it stores, how it fits into a real household routine, is genuinely part of whether that food works for your dog long term. The most nutritious food in the world is not much use if it is a faff to serve, wastes half a tray every meal, or leaves you guessing how much to give.

Within wet food comes in three tray sizes: 90g, 150g and 395g. Here is everything you need to know about which one is right for your dog, and why the format itself is worth paying attention to.

Snap. Peel. Serve.

Every Within wet food tray works the same way regardless of size. Snap the tray from the multipack, peel back the foil lid, serve. No tin openers, no pouches to squeeze inside out, no mess, no leftover food sitting in an opened can in the fridge.

The tray format is resealable after opening on the larger size, and the 90g and 150g trays are designed as single or double-serve portions that you finish in one go, so there is nothing to store at all. That is a deliberate design choice, not an accident: within designed the tray sizes to align with real dog feeding amounts so that you open what you need, serve it, and nothing goes to waste.

The packaging is also recyclable. Billions of pet food pouches go to landfill every year. Within trays go in the recycling. A small detail that adds up.

The 90g tray: ideal for small dogs and mixed feeding

The orange-coded 90g tray is the smallest in the range. At 125 kcal per tray (chicken and turkey) or 130 kcal (salmon), it is sized as a single portion for smaller dogs, or as the wet food component of a mixed feeding meal for dogs of any size.

Small breeds, typically under 10kg, covering breeds like Chihuahuas, Miniature Dachshunds, Pugs, Shih Tzus, Jack Russell Terriers, Toy Poodles and Cavalier King Charles Spaniels, have smaller stomachs and lower daily calorie requirements. A 5kg dog feeding on wet food only needs roughly half a 90g tray per meal, twice daily. At 10kg, one full 90g tray twice a day covers most of the daily requirement.

For mixed feeding, the 90g tray is the most versatile size regardless of your dog's weight. It gives you a precise, single-serve wet food component that you can add to kibble at any meal without opening a larger tray and storing the rest. For owners who mix-feed once a day at the morning or evening meal, one 90g tray per serving is a clean, no-waste solution.

The variety packs in 90g come in chicken and salmon, so you can rotate proteins across the week without committing to a full multipack of a single flavour.

The 150g tray: the everyday choice for medium dogs

The teal-coded 150g tray is the mid-range option and the most popular format for medium-sized dogs. At 187.5 kcal per tray, it covers the wet food needs of a dog roughly in the 10 to 20kg range when fed alongside dry food, or forms a solid base portion for wet-only feeding of smaller to medium dogs.

Medium breeds in this range include Beagles, Cocker Spaniels, Border Collies, Whippets, French Bulldogs, Staffordshire Bull Terriers, Springer Spaniels and Miniature Schnauzers. For a 15kg dog on a mixed diet, one 150g tray at the main meal alongside a measured portion of dry food hits the daily calorie target cleanly and with minimal fuss.

For wet-only feeding, a 20kg dog would typically need two 150g trays per day split across two meals. The 150g format makes this straightforward: one tray in the morning, one in the evening, nothing left over, nothing to measure.

The 150g variety pack includes chicken, turkey and salmon across a 12-tray multipack, which is the best way to introduce dietary rotation and give your dog genuine variety across the week without buying three separate products.

The 395g tray: built for large and giant breeds

The burgundy-coded 395g tray is the large portion format, designed for big dogs that need a meaningful amount of wet food at each meal. At 494 kcal per tray (chicken and turkey) or around 514 kcal (salmon), it is built to satisfy larger appetites without requiring multiple smaller trays per sitting.

Large and giant breeds in this category include Labrador Retrievers, Golden Retrievers, German Shepherds, Rottweilers, Weimaraners, Dobermanns, Great Danes, Bernese Mountain Dogs and Hungarian Vizslas. A 30kg dog on a mixed feeding regime would typically need around two 395g trays per day split across two meals alongside dry food. A 50kg dog on wet-only feeding may need three or more, depending on activity level and life stage.

The 395g tray is also a practical choice for multi-dog households. If you have two medium dogs, one 395g tray split across both meals covers the wet food component for the day cleanly, with nothing to store or waste.

Wet food only, or mixed feeding?

Within wet food is a complete and balanced food, which means it meets all of a dog's nutritional requirements as a sole diet. You do not need to add dry food. But many owners choose to mix, and the tray sizes are designed with both approaches in mind.

For wet-only feeding, the feeding guide on every tray gives you exact daily amounts in trays per day for your dog's weight. These are based on your dog staying lean and active: if your dog is less active or prone to weight gain, start at the lower end and adjust.

For mixed feeding, the same feeding guide includes a mixed column showing how many trays to serve alongside a specific dry food amount. This removes the guesswork entirely. You can also use the Within mixed feeding calculator online for a fully personalised daily amount.

Wet-only feeding tends to suit dogs with kidney or urinary sensitivities who benefit from higher moisture intake, dogs who refuse dry food, dogs recovering from illness who need highly palatable food, and toy breeds whose small teeth sometimes struggle with kibble. Mixed feeding suits most other dogs and is the format Within recommends for the broadest range of benefits.

Why three sizes matter

Having three tray sizes is not just a product range decision. It means that whether you have a 4kg Chihuahua on wet-only feeding or a 45kg Labrador on a mixed diet, there is a tray size that fits your dog's actual daily portion without you having to open too much and store the rest, or open too little and double up. Portion accuracy matters for weight management, for reducing food waste, and for keeping feeding time simple.

Each size has its own colour coding on the packaging: orange for 90g, teal for 150g, burgundy for 395g. Once you know your size, it is instantly identifiable on the shelf or in the fridge, which is a small thing that makes daily life noticeably easier.

What is actually in the trays

Worth saying clearly, since the format can distract from the food itself: Within wet food is made with 70% named meat or fish, is grain free, and contains FormulaBiotics(TM) in every tray. Whether you are serving the 90g or the 395g, the nutritional quality is identical. The only variable is the portion size.

Chicken trays contain 10.5% protein and 8.5% fat. Salmon trays contain 10.5% protein and 9.5% fat, reflecting the naturally higher fat content of oily fish. Turkey matches the chicken profile. These are complete and balanced values that meet FEDIAF guidelines for adult and senior dogs.

The wet food range comes in chicken, turkey and salmon. All three flavours are available across all three tray sizes, so you have full flexibility to find the right combination of flavour, format and protein rotation for your dog regardless of their size.