[Susan]

Hi why you need to feed more cups of kibble with certain brands of kibble & some kibbles you need to feed less cups is the Kcals per cup amount, the higher the Kcals per cup, you will need to feed less kibble….
You may find kibbles that are higher in Kcals per cup may cause more Intestinal Stress cause the kibble is more dense…..
A Kibble should be around 360 Kcals per cup & under when a dog has Intestinal Stress any higher then they may start to have digestive problems….. I hope this isn’t the case with Molly… Vet diets for Intestinal problems are around 360 Kcals per cup….. if you have any problems with a high Kcal per cup kibble then start feeding a kibble that isn’t as dense & are under 370Kcals per cup & feed a kibble that has 1 protein with limited ingredients….

If your dog continues to do sloppy poo’s or has diarrhea daily she’ll end up with thickening of the bowel & you’ll end up with a dog with IBD when she’s older….. I’d start her on a Probiotic like Purina Forti Floria to make her gut healthy & strengthen her immune system & start adding healthy foods high in Omega 3 to her diet… I would also stop giving her the Glucosamine supplement until her poos are firm, did your vet say to give the extra Glucosamine to an 18 month old dog that has no joint problems & has diarrhea ?