hi, there is quite a lot of info and studies that were conducted years ago and recently about what is in our food and our pets food.... you can go to your local veternarian as long as he/she is knowledgable in such stuff (not all our but that doesnt mean they are bad vets)... go to your local HOLISTIC animal clinic or store.... go to your local health food store and no i DO NOT MEAN GNC...they are not a real health food store... you can go to your local co-op...those are places to start looking for information on cancer causing ingrdients... i learn something new everyday... but even if there was just a small chance of something causing cancer wouldnt you want to be aware so you could change something if you so decided??? i do, so thats why i am telling everyone what i have learned so far...go to: www.naturapet.com look up the list of ingredients that are good and bad...click on each one to see where it comes from and what it is... also read the AAFCO trials...there is quite alot of info and books that you can get alist of from ther... hope this helps... sincerly, Trudi ps here is a number 1-800-497-5665 they sell animal holistic medicine... there store is located here in tucson so its not exspensive for me but it might be for others...i hope not...i plan on tato the naturopath that owns the store tommorow...i will let you know what i find out...she is going to school tyo use her knowledge for animals... [Posted in FML issue 2612]