I know there was a study done but it wasn't very well researched... I left a vet once for telling me to get my cat (Clover at the time) off of wet food and do dry only because of this *new* research that was done. Basically it told me she didn't know much about cats so I found a new vet. Of course since then I like doing raw foods but Clover is still on dry/wet diet as he is no longer in my household (but still considered one of my babies!).
This is a breeder that does raw and is a bit on the extreme side but makes a lot of good statements about dry. She has also authored some books on felines and has done a lot of research:
http://www.blakkatz.com/dryfood.html
I do agree with her though..the only way to successfully eliminate gum/tooth problems in cats is chunks of meat. I have been feeding ground meat to my cats (with bone too) and still find they have mild gingivitis. Now I feed chunked beef a couple times a week and it thrills me to see them gnawing/chewing more on each piece (to soon to tell if the gum health is improving). Plus they just love it. I know its so healthy for their gums. My vet also has given me those peacock feathers. Evidently chewing on the stem of these feathers is great for the teeth and acts as a natural tooth brush. So far Meeka is the only one that has figured out she can gnaw these to death but maybe the other 2 will come along with it eventually.
This is a breeder that does raw and is a bit on the extreme side but makes a lot of good statements about dry. She has also authored some books on felines and has done a lot of research:
http://www.blakkatz.com/dryfood.html
I do agree with her though..the only way to successfully eliminate gum/tooth problems in cats is chunks of meat. I have been feeding ground meat to my cats (with bone too) and still find they have mild gingivitis. Now I feed chunked beef a couple times a week and it thrills me to see them gnawing/chewing more on each piece (to soon to tell if the gum health is improving). Plus they just love it. I know its so healthy for their gums. My vet also has given me those peacock feathers. Evidently chewing on the stem of these feathers is great for the teeth and acts as a natural tooth brush. So far Meeka is the only one that has figured out she can gnaw these to death but maybe the other 2 will come along with it eventually.