Yes, I’ve seen this in sooooo many dogs. She has been on garbage for so long that her body can’t tolerate too much good nutrition.
First of all, find her a good probiotic and give her a small dose every day for a really good long time. Mercola has a good one. It is more expensive but it has a good number of different strains and that’s important right now. If you go through a couple jars of it, you should be good to switch to a cheaper brand after that.
Second, I’m sorry to say this, but put her back on the Beneful for a couple weeks. When her system has completely calmed down, start her on 1/4 new food and 3/4 Beneful. Leave her on that for a full month and see if her stools stay consistent the whole time. If they don’t, then she may have a food intolerance to something in the new food and that’s why the intermitant problems. You will need to pick a new food with very different ingredients and start over. If her stools stay consistent, after a month, start giving half Beneful and half new food. You probably should decrease the amount she is getting at this point because the new food is most likely higher calorie and that alone can cause stool issues. Leave her on that for at least 2 weeks, a month would probably be better unless her stools are just really, really good the whole time. Then go to 1/4 Beneful and 3/4 new food. Again decrease the amount you feed. If stools get loose at all, back up to the previous stage and leave her there longer, if they stay great, then 2 weeks at that amount or until the Beneful is gone, then you should be good to go 100% new food. Decrease food and watch her weight. Keep giving the probiotics at least 2 weeks after she is totally on the new food, if not forever, and then you can decrease the amount of probiotics to just twice a week.
Third, read up on the benefits of feeding a rotational diet and decide on the next food you want to switch her to. Each switch will get easier and easier until you don’t have to transition at all anymore. Good luck!
