Raw feeding a Great Dane puppy safely

Getting calcium and phosphorus right for a Great Dane puppy is genuinely one of the most important things you can do — giant breeds are uniquely vulnerable to skeletal problems when those ratios are off during the growth phase, and raw feeding done carelessly makes it very easy to get wrong. Raw feeding done well can be excellent, but done badly it creates nutritional gaps that cause real harm over time, and the difference is balance and sourcing. To point you toward the right option: is your Dane currently eating raw or are you transitioning from kibble, and are you looking to prepare meals yourself or use a complete ready-made raw product?

That's exactly the right instinct. At 5 months a Great Dane still has a huge amount of skeletal development ahead of him — they don't fully mature until around 18 to 24 months. The danger with DIY raw at this stage is that it's genuinely hard to hit the correct calcium-to-phosphorus ratio of roughly 1.2:1 to 1.4:1 consistently, and excess calcium is actually just as harmful as a deficiency in giant breeds, causing abnormal bone growth. A properly formulated complete raw is a much safer starting point. Can I ask — are you thinking frozen raw, or would air-dried or freeze-dried work for your storage situation?

Perfect. Given his age, size, and that you need something nutritionally complete with verified mineral ratios, I'd recommend Natures Menu Complete & Balanced Raw Nuggets — specifically their puppy range. They're formulated to FEDIAF guidelines which means the calcium and phosphorus ratios are calculated and tested, not guessed. The nuggets are easy to portion for a dog his size, they contain the right bone content already ground in so there's no risk of bone splinters or ratio errors, and at roughly 3–4% of body weight per day for a growing giant breed puppy, the bulk 2kg bags make it reasonably cost-effective. Crucially, because it's a complete food you don't need to add supplements, which is where a lot of raw feeders accidentally create imbalances. Transition slowly over 10–14 days given he's coming off kibble — mix increasing proportions of the raw in with his current food to avoid digestive upset.

No — and this is really important — do not add extra calcium to a complete raw food. It sounds counterintuitive but in giant breed puppies, calcium supplementation on top of a balanced diet is a documented cause of osteochondrosis and developmental orthopaedic disease. The food is already complete. The only thing worth considering is a high-quality omega-3 oil like pure salmon oil if the coat needs support, but that doesn't affect mineral balance. Feed the complete food as directed, weigh his portions accurately as he grows, and get a body condition score check from your vet every couple of months — at 5 months he should be lean, not rounded.

For a Great Dane, I'd wait until 18 months minimum, and some vets recommend staying on a puppy or all-life-stages giant breed formula until 24 months given how long they take to fully develop. Don't rush it based on size — he'll look adult long before his skeleton is finished. When you do transition to adult, do it the same way: gradual swap over 10–14 days. Keep an eye on his weight through that period too, because adult formulas are often more calorically dense and Great Danes can put weight on quickly if portions aren't adjusted.