Fresh food diet effects vary by dog breed, vet nurse says

Butternut Box veterinary nurse Leah Callaghan has outlined how minimally processed dog food may affect six popular breeds, covering areas including digestion, skin condition, energy levels and weight management.

Callaghan defines fresh dog food as made from human-quality meat and vegetables, gently cooked and frozen to preserve nutrients, with temperature-controlled storage required.

"Different breeds have different biological and behavioural needs, so it's no surprise that diet can have a noticeable impact quite quickly," Callaghan said. "Fresh food can be a helpful way of supporting dogs who are prone to sensitivities, weight gain, or high energy demands, because it focuses on highly digestible, minimally processed nutrition."

"When we reduce unnecessary processing, we often see improvements in how dogs digest food, how they maintain weight, and how comfortable they feel day to day," she added.

Callaghan's breed-by-breed breakdown:

1. Labrador Retriever: "In the clinic, conversations about Labs almost always come down to weight management, joint health and skin," said Callaghan. "As anyone who owns one knows, they have a legendary appetite and are not great at knowing when to stop eating. Fresh food is a great tool here because it has high natural moisture and volume, helping physically fill the stomach and support satiety. 
   "A good level of natural fiber, alongside low-glycemic ingredients, can also help them feel fuller for longer while supporting steadier glucose levels," she continued. "This can be especially useful for Labradors, who are prone to carrying extra weight, which in turn can put pressure on their joints. Because they are a larger breed, they also benefit from carefully balanced nutrients, including quality protein and minerals such as calcium, to support muscle maintenance and overall musculoskeletal health. 
   "The glossy coat and flaky skin point is another good one: with many highly processed diets, dogs can end up with residue around their jowls and skin folds, so moving to food made from whole, clearly recognizable ingredients can support the skin barrier from the inside out."
2. French Bulldog: "Frenchies are lovely dogs, but they are a breed known for having rather delicate digestions and reactive skin," explained Callaghan. "It's fairly common for them to experience food sensitivities, skin flare-ups, and … chronic flatulence. 
   "There are a number of contributing factors, including genetics, environment, and intolerances," she added. "In some cases, dogs do respond well to simpler, more limited-ingredient diets where specific triggers are easier to identify and avoid. When a dietary trigger is present, this can show up over time as improved stool quality, reduced scratching, and better weight management, especially in a relatively low-activity breed."
3. Cocker Spaniel: "If you ask a vet what they most commonly see Cocker Spaniels for, skin and ear sensitivities are usually right at the top of the list," said Callaghan. "There is a beautifully strong gut-skin connection in this breed, meaning that providing a gentle, easy-to-digest diet can make a wonderful difference to their overall comfort. 
   "We also talk more and more about the gut-brain axis, and how supporting digestive health may help promote a calmer, more balanced system from the inside out," she continued. "Nourishing them with clean, straightforward ingredients helps maintain a settled digestive tract. When you support a Cocker Spaniel's gut health from the inside out, it naturally reflects on the outside, helping to promote clear ears, healthy paws, comfortable skin, and a beautifully shiny coat."
4. Border Collie: "The metabolic demand on a young Border Collie is exceptional, both neurologically and physically," said Callaghan. "Because of this high output, nutrient efficiency is critical. Fresh food undergoes minimal processing, preserving the natural structure of proteins and fats. This high bioavailability means the body can use nutrients more effectively. For an active breed, this supports stable energy levels, better endurance, and optimal cognitive function."
5. Jack Russell Terrier: "Jack Russells have an incredibly high basal metabolic rate," said Callaghan. "They need a diet that delivers clean, efficient energy. Diets high in poorly digestible binders can cause rapid gut transit, which can affect body condition as well as behavior changes over time. 
   "Whole food provides highly digestible macronutrients that are easier to convert into usable energy, supporting lean muscle mass and helping avoid the peaks and crashes sometimes seen with more processed diets."
6. German Shepherd: "Large breed growth management is critical, particularly for German Shepherds who are predisposed to musculoskeletal issues and gastrointestinal sensitivity," said Callaghan. "Heavy processing can alter protein structures, making them harder to digest and potentially irritating a sensitive gut. Fresh food is gently cooked, supporting better nutrient absorption and helping promote a steady, controlled growth curve that supports joints while being gentler on digestion."