A couple of questions for you. How long has he been on this food?  How long has he had gas/loose stools? Does he get any other treats or chewies at all? Has he had any vaccines or medications within the last month? Has he been to any public areas lately? Has he had encounters with other dogs?
There are so many things that can cause loose stools, and food is only one of them. Before switching, I would try a few other things first, because switching itself can cause runny poops and you won't be able to pin it down. Switching formulas within brands would have less of a runny poop effect, because the basic ingredients are likely to be from identical sources, so the differences are less of a shock to the intestines.Â
I've never used the LBP, so I can't tell you from experience about any problems with it. We started our pup on Innova Adult (not Large Breed Adult) before the Large Breed line came out. We have had such success with her on it that we decided not to switch when the new product came out. The puppy food actually has less fat in it, not more, so too much fat likely isn't the problem.
Two of my dogs have had runny poops lately, one right after the other, and they are on different foods (Lucy, the pup, is on Innova Adult, and Mattie, the adult, is on Innova Evo), so we didn't suspect the food. Given the sudden onset of Mattie's unpleasantness, I suspect she either ate something nasty in the yard or contracted some sort of stomach virus. We also had a foster dog here for a few days about two weeks before. Anyway, after the second day, we fasted her for a day then started her on some pumpkin in her food. The poops were firming in another day and solid in two more days. This was about the time Lucy's runny poops started. She could have eaten the same nastiness in the yard or caught something from Mattie or the foster dog. She also could have been having problems from an antibiotic she was on a couple of weeks ago. So, we started her on pumpkin and yogurt in her food--the pumpkin just to firm up the stool, and the yogurt to restore her intestinal flora. After three days, we had decent poops again.
Our long-term foster, Elli, came to us with what was termed "chronic diarrhea" and she was being fed a prescription diet that was clearly not working. We switched her cold turkey to Innova Adult and added pumpkin to her food. Within a couple of days her liquid poops had form to them, and within a week and a half they were firm. We weaned her slowly from the pumpkin, and she has had firm stools ever since (about six weeks now).
So, first consider all the possible reasons for the runny poops. If you eliminate other possible causes and the poops persist, consider switching him to the Adult (green bag) formula before switching brands altogether. Innova is a very good food and I have yet to have a problem with it, even with any of the many fosters I have switched to it cold turkey. On the other hand, it just may not be a good match for Lucah's needs. But since it seems to work for most dogs so well, and because switches can cause their own problems, I would work hard to eliminate other possible causes first.
Different dogs respond differently to things in their food and in their environment. We gave Lucy a bully stick once--just a little piece of one--and she had nasty gas for a week! Buddy eats them with no problem. Good luck getting to the bottom of Lucah's issues!
We e switched him to the Innova about 2 months ago. He started out really great and it was an improvement from the Solid Gold we were giving him, so naturally we thought he was gonna do fine. About 1 month ago he started having the loose stools, maybe once a day. Lately it has become more and more.
As for treets we give him biscuits that are fairly natural and simple, and he gets pieces of a Natural Balance meat log thingy. We don't think he's getting into anything, but we will keep an eye on him.