Calcium & phosphorus
For most dogs, calcium is not something to worry about. For a large-breed puppy it is the single best-documented nutritional risk on the label, because a growing skeleton cannot regulate excess calcium the way an adult can, and too much during growth is associated with developmental orthopaedic disease. The catch: calcium is not a required guarantee, and only 604 of the 2,354 labels we have verified (25.7%) print it.
The large-breed growth clause
AAFCO growth profiles carry a maximum for calcium, and a separate statement covers "growth including growth of large size dogs (70 lb or more as an adult)". A food substantiated for growth generally is not automatically substantiated for large-breed growth — that clause is the thing to look for on the bag.
The ratio matters alongside the absolute level. Calcium and phosphorus are absorbed in relation to each other, and a ratio roughly in the 1:1 to 2:1 band is the conventional target for growth.
Why our large-breed-puppy list is short
A check is only as good as the disclosure behind it, and we will not run this one on an assumption. Where a label does not publish calcium we cannot verify the ceiling, so the food does not appear on the qualifying list — it is not a fail, it is an unknown, and we mark it as one. That is why the large-breed puppy page ranks fewer foods than a site willing to guess.
What to do with an undisclosed label
Ask the manufacturer. Most will give you a full typical analysis on request even when they do not print one, and for a large-breed puppy it is worth the email. If you cannot get it, a food that carries the large-breed growth clause in its AAFCO statement is the next best evidence available from the bag alone.
Frequently asked
How much calcium is too much for a large-breed puppy?
AAFCO growth profiles set a maximum, and the large-breed growth statement exists precisely because the ceiling matters more for dogs that will exceed about 70 lb as adults. Your vet should set the target for an individual dog.
Why do so few pet foods list calcium?
It is not a required guarantee. Protein, fat, fibre and moisture are mandatory; calcium and phosphorus are optional, and only 25.7% of the labels we have verified include calcium.
What is a good calcium to phosphorus ratio?
Roughly 1:1 to 2:1 is the conventional band for growth. We compute it wherever both figures are disclosed, which is on about a quarter of the corpus.
Related
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AAFCO statement
1,373 statements read · 235 feeding-trial · 1,138 formulated
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Guaranteed analysis
The four mandatory guarantees, read off 2,354 verified labels
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Label transparency
Median disclosure 47% of tracked fields, across 2,354 labels
See it applied
Every figure discussed here is computed on each product page from that food’s own verified label, with gaps marked rather than filled. Start with every priced dog food ranked by cost per 1,000 kcal, browse every verified cat food, or read what is actually in pet food — ingredient prevalence counted across all 2,354 labels. The full extraction method is in the methodology.