diet for lab getting over pancreaitis

Question
Hi,
My four yr old lab is getting over pancreatis. (one week ago) The vet put her on presciption canned hills i/d and told me to mix it with IAMS lamb and rice formula for sensitive stomach. Well I did this on Fri night and she got sick early Sat morn. I believe it was from the new food so I just kept her on the canned all day Sat. I dont want to keep her on that forever so what can I give her that is low fat?  She was on royal canine for labs before she got sick. She got sick because of people food. Should I just put her back on royal canine gradually? She did good on it but not sure of fat content as I do not have the bag. What do you suggest I feed her as long term? I am just worried on what to feed her as I dont want her to have another attack.
Thanks,
Janice

Answer
It could be you made too rapid of a change mixing the Iams into the Science.  I would start over.  What are you feeding, about 3-4 cups?  Start out with only a half cup of the Iams and add a half a cup more each day until it is all Iams.  I am a little surprised the vet suggested it for a dog with pancretitus since it tends to be higher in fat.  Perhaps he has had good experience with the sensitive stomach formula, and it may be lower in fat than the regular.  Although most dogs will thrive on most chows, it is possible yours won't do well on Iams.  I also would go along with going back to the Royal Canine.  In general, the less switching around you do, the better.  I don't retain information such as its fat content, but likely it is on their website, and if not, on some of the sites that advertise here.  I would think however outrageous and dishonest their marketing hype is, at least they wouldn't publish bogus contents for other products.  Their allegations about common brands of dog chow don't fit my real world knowledge of seeing thousands of dogs thriving on them.  

I hope your vet counseled you on keeping your dog lean.  Here is a good link to maintaining good body condition, http://www.longliveyourdog.com/twoplus/RateYourDog.aspx