Hi Jeannine M,
The article isn’t “wrong” the levels reported are the ranges that are currently adopted/adapted by AAFCO. AAFCO based its range on NRC recommended and safe upper limits and is that groups interpretation of the available research. NRC minimum Ca level is 2 grams/1000kcals, adequate is 2.5 grams/1000kcals, recommended is 3 grams/1000kcals and safe upper limit is 4.5 grams/1000kcals
I think where the confusion comes in is that veterinary nutritionists, when writing about LBP generally recommend to stick to the NRC recommended level which is 3 grams Ca /1000 kcals. More Ca than that isn’t needed. Considering that there is individual variation in energy intake between dogs and activity levels and even how tightly a manufacturer is monitoring their finished products the best way to avoid excessive Ca intake or even insufficient Ca intake is to stick close to the NRC recommend level which is 3.0.
In regards to ratio it may not be as important as the actual intake amount but nutritionists will recommend to stick to a ratio close to the reported”ideal” of 1.2:1
As for myself, and others too, when you consider you only have one chance to form a sound orthopedic structure I only purchase products from those companies that have shown a vested interest in supporting proper LBP growth and have the quality control procedures in place to ensure that their food is meeting their specifications. I’ve found that it is the larger companies that do this. They’ve actually fed their diet to Large Breed Puppies and monitored growth parameters. This is why you’ll find vets recommending Hill’s and Purina and Royal Canin
