Different dog food types explained: wet, dry and grain-free

Walk into any pet shop, and the choice of dog food can feel overwhelming. Wet, dry, raw, grain-free, cold pressed, freeze-dried. Every bag, tin, and pouch promises something different, and knowing which one genuinely suits your dog isn't always straightforward.

The truth is, there's no single food type that's right for every dog. What matters is understanding what each option actually offers, how it's made, what to look for on the label, and how it fits your dog's individual needs. This guide breaks it all down in plain terms so you can make a confident, informed choice.

Why choosing the right dog food type matters

The food your dog eats can influence their coat condition, energy levels, digestion, and long-term well-being, so it's worth taking the time to understand what you're feeding.

Choosing well doesn't have to be complicated, but it does mean looking beyond the brand name on the front of the pack. Looking for a clearly named animal protein as the first ingredient and a transparent breakdown of what's in the recipe can help you make a more informed choice about what you're feeding.

Overview of the main dog food types

Dog food broadly falls into four categories: wet, dry and grain-free. Some overlap. A dry food can also be grain-free. A wet food might tick all three boxes at once. Understanding each category on its own terms helps you see where the real differences lie and which combination works best for your dog.

Each type has genuine strengths and honest trade-offs. None of them is automatically "better" than the others. 

Wet dog food explained

Wet dog food comes in tins, trays, and pouches with a moisture content typically between 60% and 80%. That high water content means the food has a softer texture and a stronger aroma, which most dogs find appealing.

The higher moisture content also means wet food delivers fewer calories per gram than dry food. You'll typically need to feed a larger volume to meet the same energy requirements, and once opened, it needs refrigerating and using within a couple of days.

When wet dog food may suit your dog

Wet food is often a good fit for dogs who are fussy eaters, since the stronger smell and softer texture tend to encourage appetite. It also works well for dogs who don't drink enough water on their own, older dogs who may struggle with harder textures, and dogs recovering from illness where palatability matters.

Mixing a complete wet food with dry food is a popular approach that combines the convenience of kibble with the hydration and taste appeal of wet.

Things to consider when feeding wet dog food

Cost per meal is generally higher with wet food, and storage needs more thought once opened. Look for wet food with a high percentage of meat or fish ingredients from a named source. AATU's wet dog food recipes contain 90% meat or fish ingredients with 10% Superfood Blend™.

Dry dog food explained

Dry dog food, or kibble, is the most widely fed type in the UK. It's convenient, has a long shelf life, is easy to measure and store, and typically costs less per meal than wet or raw options.

Certain cooking methods, such as small-batch, lower-temperature preparation, may help preserve nutrients from raw ingredients. This approach is used in some recipes to help maintain the natural properties of the ingredients while supporting overall nutrition.

When dry dog food may be the right choice

Dry food suits dogs who thrive on routine and consistency. It's practical for busy households and easy to portion accurately.For owners who want a reliable, everyday feeding option that doesn't require refrigeration or preparation, dry food is hard to beat.

Things to consider when feeding dry dog food

When choosing a dry food, it's worth looking closely at the ingredients and formulation. Checking the percentage of meat or fish ingredients in a recipe can help you understand how the food is formulated and whether it aligns with your dog's needs.

Hydration is the main watch-out with dry food. Dogs on a purely dry diet need access to plenty of fresh water and may benefit from having a small amount of wet food or warm water added to their meals.

AATU's dry dog food recipes use an 80/20 ratio of single-source meat or fish ingredients to our Superfood Blend™ of fruits, vegetables, herbs, spices, and botanicals. Each recipe is cooked using our Low and Slow™ method in small batches to lock in essential nutrients, then finished with an expertly crafted coating made from raw ingredients.

Grain-free dog food explained

Grain-free dog food is formulated without wheat, corn, rice, barley, oats, or any other grain. Instead, the carbohydrate and fibre content comes from alternative sources like sweet potato, chickpeas, or vegetables.

Grain-free recipes use alternative carbohydrate and fibre sources in place of grains, which some pet parents prefer for dogs with specific sensitivities. For dogs with sensitivities or intolerances to specific grains, removing them from the diet may make a difference to digestion and skin condition.

When grain-free dog food may be beneficial

Grain-free food is worth considering if your dog shows signs of sensitivity to grains, such as itchy skin, digestive upset, excessive gas, or recurring ear infections. If your dog tolerates grains well, there's no requirement to avoid them. Grains can be a nutritionally valuable part of a balanced diet.

It's worth noting that grain-free doesn't automatically mean the recipe is better suited to your dog. Starch is required for the formation of kibble, so grain-free recipes use alternative starch sources such as potatoes or peas. What sits alongside those starch sources in the recipe is worth looking at. Some formulations also include a purposeful blend of fruits, vegetables, herbs, and botanicals.

Things to consider with grain-free diets

Not every dog needs grain-free food. Plenty of dogs digest grains perfectly well, and a food that includes whole grains like brown rice can be nutritionally sound. The key is to choose grain-free for the right reasons, based on your dog's individual needs and how they respond to the diet.

All AATU recipes are grain-free and gluten-free, not as a trend, but as part of our commitment to pure, instinct-driven nutrition. Removing grains allows us to dedicate more of each recipe to high-quality single-source protein and our Superfood Blend™.

High-protein dog food explained

Some recipes contain a higher percentage of meat or fish ingredients than others, which naturally influences the protein content of the food. Protein supports muscle growth, tissue repair, coat health, immune function, and sustained energy, so the source and proportion of meat or fish ingredients in a recipe are worth paying attention to.

When may a higher meat content suit your dog

Active dogs, working dogs, and breeds with higher energy demands may benefit from recipes with a higher percentage of meat or fish ingredients to support their muscles and recovery after exercise. Growing puppies need adequate protein to support development, and senior dogs may benefit from maintained protein levels to help preserve muscle mass that naturally declines with age.

How much protein your dog needs will depend on their age, size, activity level, and health. Rather than focusing on a specific number, look for a recipe with a clearly named meat or fish ingredient and a proportion that reflects your dog's individual requirements.

Things to consider with higher meat content recipes

The digestibility and source of the protein in a recipe matter. A clearly named, single-source meat or fish ingredient can make it easier to understand what your dog is eating and how they may respond to it.

Dogs with certain kidney or liver conditions may need a protein-managed diet, so it's always worth checking with your vet if you have any concerns.

Raw dog food explained

Raw feeding is based on the idea that dogs thrive on a diet closer to what their ancestors ate: raw meat, bones, offal, and some fruit and vegetables. In the UK, the approach has grown significantly over the past decade, with both home-prepared meals and pre-made frozen options now widely available.

Raw food is minimally processed, which means more of the natural nutrients may survive intact. Many owners who feed raw report improvements in coat condition, firmer stools, better energy levels, and less doggy odour.

When raw dog food may suit your dog

Raw feeding can work well for dogs who thrive on high-meat diets, those with sensitivities that haven't responded to other food types, and owners who have the time and knowledge to manage it properly. Dogs with fussy appetites often respond well to raw food too, since the taste and texture are naturally appealing.

Things to consider with raw feeding

Raw feeding requires consideration of safe handling and correct storage. Commercial raw diets are formulated to be nutritionally balanced, though home-prepared raw meals require careful attention to ensure nutritional completeness.

There may also be a bacterial risk. Raw meat can carry salmonella and E. coli, which poses a concern not just for your dog but for the humans in the household, particularly young children or anyone with a compromised immune system.

For owners who love the nutritional thinking behind raw but want the convenience of a dry format, raw-inspired dry food offers an alternative approach. AATU's dry dog food recipes use 2.5kg of raw ingredients to produce every 1kg of food, cooked using our Low and Slow™ method in small batches to lock in nutrients, then finished with an expertly crafted coating made from raw ingredients. It's the benefits of raw feeding, served simply.

Mixing and rotating dog food types

Many owners choose to mix wet and dry food, or rotate between proteins, and there are genuine benefits to doing so. Mixing formats can improve hydration, increase palatability, and provide a more varied nutritional profile. Rotating proteins can reduce the risk of developing sensitivities to a single protein source and keep mealtimes interesting for dogs who are prone to going off their food.

How to safely mix or rotate dog food

The golden rule is to make any change gradually. A sudden switch from one food to another is one of the most common causes of digestive upset. When introducing a new food, mix a small amount with the current one and increase the proportion over seven to 10 days.

If you're mixing wet and dry at each meal, reduce the dry portion accordingly so the total calorie intake stays consistent. Overfeeding is easy when two formats are in the bowl.

Rotating between proteins within the same brand is generally smoother than switching between brands entirely, since the base formulation stays consistent. AATU's range of single source proteins, from Free Run Chicken and Atlantic Salmon to Angus Beef, Free Run Duck, and beyond, makes rotation straightforward while keeping the quality and formulation consistent.

How to choose the best dog food type for your dog

Choosing the right food comes down to four things: your dog's age, their health, their activity level, and any sensitivities they may have.

Puppies need food formulated for growth with higher protein and fat, plus DHA for brain and vision development. Active adult dogs benefit from high protein and moderate fat to fuel their energy without encouraging excess weight. Senior dogs need protein to maintain muscle mass, with joint-supportive nutrients and slightly fewer calories to match their slower pace.

If your dog has skin issues, digestive sensitivity, or recurring ear infections, a grain-free, single-source protein food can make it easier to identify potential triggers. You know exactly what's in the bowl, which makes identifying triggers far simpler.

If convenience and consistency are priorities, dry food is a practical starting point. If your dog needs extra hydration or is a fussy eater, adding wet food makes sense. If you're drawn to the nutritional philosophy of raw feeding but prefer the convenience of a dry format, a raw-inspired dry food offers an alternative approach.

AATU dog food and different feeding approaches

AATU recipes are crafted to give pet parents a genuine choice across food types without compromising on quality.

Our dry dog food range uses an 80/20 ratio of single-source meat or fish ingredients to our Superfood Blend™, with 2.5kg of raw ingredients used in every 1kg of food. Cooked using our unique Low and Slow™ method and finished with a raw ingredient coating, it delivers the benefits of raw feeding, served simply.

Our wet dog food recipes offer 90% meat or fish ingredients with 10% Superfood Blend™ for owners who prefer wet feeding or want to mix formats.

Every recipe across the range is grain-free, gluten-free, and contains no fillers or artificial additives. Added prebiotics support healthy digestion, and single-source proteins across the full range make it easy to rotate, identify sensitivities, or simply find the protein your dog loves most.

AATU is rated in the top 2% of dry dog food on All About Dog Food, and our recipes are available at Waitrose, Pets at Home, Jollyes, Amazon, and directly from aatu.co.uk.

Frequently asked questions about dog food types

Is wet or dry dog food better?

Neither is automatically better. Dry food offers convenience and consistent nutrition. Wet food provides higher moisture content and stronger palatability. Many owners find that mixing both gives their dog the benefits of each.

What does grain-free dog food mean?

Grain-free means the recipe contains no wheat, corn, rice, barley, or oats. Starch is required for the formation of kibble, so grain-free recipes use alternative starch sources such as potatoes or peas. Some formulations also include fruits, vegetables, herbs, and botanicals alongside those starch sources.

Can I mix wet and dry dog food?

Yes. Mixing wet and dry food is a popular and practical approach. Reduce the dry portion to keep total calories consistent. All complete pet foods are required to meet certain nutritional standards, so mixing formats from different brands can work well too.

How do I switch my dog to a new food type?

Gradually, over 7 to 14 days. Start by mixing a small amount of the new food with the current one, increasing the proportion each day. This gives your dog's digestive system time to adjust and reduces the risk of upset stomachs.

How do I know which dog food type is right for my dog?

Consider your dog's age, activity level, health, and any sensitivities. A single-source protein food with no artificial additives can be a good starting point for most dogs. From there, adjust the format and formulation based on how your dog responds.