Join Date: Dec 2007
Location: Ontario Canada
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Photo Submissions 112 Times in 110 Posts
Letter from Sabine about this. ..
According to my comparison of detailed analyses of various food brands, it's pretty much six of one or half a dozen of the other, because nutrient contents can vary so much even from one formula to another within one single line of products from the same company. Even if there aren't any tremendous differences between two food formulas apart from the type of protein used (e.g. California Natural lamb vs. chicken).
AAFCO mandates that certain minimum nutrient requirements are met, but how much the individual product exceeds them doesn't matter all that much. To give you a tangible example, the following products are all made by the same company, are within the same line of products, and are pretty simple formulations (no long list of ingredients):
Formula, calcium; phosphorus; copper; iron; zinc, all in mg per kg:
1. 22,900; 15,300; 16.0; 348.8; 68.8
2. 4,800; 3,000; 1.0; 31.0; 17.0
3. 35,600; 22,700; 2.2; 98.6; 54.8
4. 22,500; 14,700; 2.6; 69.3; 71.8
5. 18,100; 12,900; 2.9; 98.5, 52.7
Personally I tell people if they want to rotate, let their dog be the guide in regards to what works best. For instance, one dog may not do well on anything but fish-based foods, then rotate between fish-based foods from several manufacturers. If it doesn't matter for the dog, you can rotate among different "flavors" of the same line, or different manufacturers, or both.
Dave and Molly
Ian Dunbar was awarded the Outstanding Achievement Award from I.P.D.T.A. Here's a picture of me accepting the award on his behalf.
Member of IAABC ,International Association of Animal Behavior Consultants , Member of Pet Professional Guild