[Susan]

Hi Nancy, you need to try a food with the same fat, protein & fiber % & similar ingredients to the vet diet, minus the crappy ingredients also has the food she doing well on have Beet pulp?? what vet food were you feeding her that she does great on?? Was the Merrick a wet tin food??
Food sensitivities take anywhere from 1 day to 6 weeks to show any symptoms, I rescued my boy & this happened with him, 4 yrs later finally over the years I worked out what he can eat & can’t eat, also you need to strengthen her gut, order some Purina Forti Flora probiotic & start her on 1/2 the recommend dose for 1 week then slowly go to proper dose by 2 weeks….you need to start an elimination diet, so you start with a vet diet that agrees with her for 2 months, no treats, no other foods to make sure she is still doing firm poos, maybe try the vet formula in a kibble, kibble works out cheaper then the vet diet wet tin foods but the ingredients very, wet diets have better ingredient to their kibbles, I had Patch on the Hills I/d Digestive kibble for 1 week everything was great 2nd week he was doing sloppy yellow poos that stunk, so I took back the Hills vet diet & got a refund, she needs to be on the vet diet for around 4 months to make sure everything is going great, then you add 1 new cooked ingredient, say boil chicken for 1 month no reaction then add boiled sweet potatoes for 1 month & still the chicken, every month add 1 new ingredient while still feeding the vet diet minus some of the vet diet replaced with ur cooked food, it takes time but in the end you will know what foods she is sensitive to….
Keep a diary, what foods wet & kibble you have tried, so you can look back if needed..
“Holistic Select” formulas kibbles they are for digestive health, & have single proteins formulas with rice & beet pulp like vet diets, Patch is eating the Holistic Select Adult/puppy, Salmon, Anchovy & Sardines Grain Free kibble it just has potatoes & peas, there’s no lentils, no chick peas at the moment poos are great & only 2 poos a day but back in the beginning he ate the Holistic Select Adult Duck meal & Rice formula kibble it has beet pulp & rice like the vet diets have, the Holistic Select wet tin foods are too high in fat around 6% when converted to dry matter (Kibble) 6%-fat is about 30% fat if it was a kibble, vet diets fat % is lower in wet tin formulas then some of the normal brand wet diet formulas sold in pet shops, if your feeding a wet tin vet diet then you need to try wet tin foods, not kibbles or try the vet diet in a kibble & see does she have the same problems??
Have you tried the vet diet in the kibble formula??
It’s stressful & it takes time, like I said 4yrs, I’ve had Patch & I needed to find a brand food (kibble) he did well on & keep him on that food for 6 months then so slowly add 1 new food to his diet…also vet diets have higher or lower soluble & insoluble fibers, where pet shop foods are all made the same for dogs with a normal bowel with no health problems also most vet diets aren’t grain free, so you need to look at foods like “Canidae” Life Stages “Platinum” it has brown & white rice & turkey, similar to the ingredients to the Hills I/d formulas also Canidae make a wet tin food called life stages Platinum, the fat is low, the protein is low like the vet diet tin food, so is the fiber. another thing normally rescue dogs are feed supermarket crappy diets, then when feed a good quality higher fat & high protein foods they have diarrhea cause they are not use to eating so much fat & protein, that’s why they do well on the vet diets cause they have the gluten corn meal & crappy ingredients as well.. look at the kibbles with rice not the grain free formulas for now..
Holistic select site http://holisticselect.com.au/recipes.aspx?pet=dog
Canidae site http://www.canidae.com.au/dog-food/ scroll down for the Life Stages formulas
It takes time & slow & steady when adding new foods, add 1 thing at a time over 1 week so you know what caused the problem if you have a problem like diarrhea or sloppy poos..