my boy Duke who is 1 year old today!!! has been on pedigree since i have had him(7months) my vet recomended it! I had my boy zues, who passed away just before x-mas on it as well(per vet advice) and they both have done well on it! Is it okay?? you all have me worried now!! I have never heard of most of the brands you keep refering to! should i change his food??