Grain free stopped my dog from having seizures. She only had three (in a year) before this nervous owner swapped her over, but she’s been on the food for two years now and hasn’t had another.
In terms of coat; all three of my dogs have fabulous coats. The Aussie mix still blows out disgusting quantities of hair twice a year, but it’s over in a few days vs. a week or more. The Border Collie always had dry, itchy skin, which is all gone now.
The teeth is probably the largest area of improvement apart from the seizures. Their teeth and gums (I have a 1.5 year old, 4 year old, and a 9 year old) are all sparkling white and clean, no plaque anywhere. Their vet is always amazed and impressed and comments on them at every appointment, wondering if I brush their teeth.
My border collie also has fatty tumors, which have not increased in size/number since the grain free swap two years ago.
While it is more expensive, I also feed less than the grocery store stuff. My Aussie, for example, gets 1 cup twice a day; her 75lb shepherd brother does too. The Border collie gets a 1/2 cup twice a day, as her activity level is much less.
I know everyone is not on the grain-free bandwagon, and millions of dogs have lived long lives on Pedigree/Purina/Walmart brand/etc. But I’ve seen drastic improvements in my dogs and won’t be going back. My particular brand is also all made and sourced from the USA, which comforts me both in economy terms, and in all the pet food scares that keep coming out of China. (Taste of the Wild.)