Dogs need fat n 17% is all good. The oils you need to watch would be like Palm oil, soy etc..
To get rid of tear stains (yeast) is with a good probiotic n prebiotic from food source. I feed them a raw diet n stains disappeared. Their is a big difference in probiotics as a supplement form n as food wise. I give them that green smelly tripe you’ll find at the pet shop frozen section. But you absolutely need to wipe them folds to keep them dry all times. Nyala doesn’t have fold issues as she’s a bantam bulldogge so their folds are small. But Jake his is a daily routine. Part of an English Bulldogs maintenance.
https://www.darwinspet.com/blog/prob...otics-dog.html
https://www.dogsnaturallymagazine.co...tics-for-dogs/