Hi everyone - my boyfriend has a 7-year-old female boxer that has been having random diarrhea overnight. She's always had a sensitive stomach and has had accidents when her schedule changes, but it's worse now than ever. The weird thing is that some nights she goes 14 hours with no problem, and the next night can't make it for 8. She has good energy and seems healthy otherwise. She gets fed once a day in the morning - 3 cups of Nutro Natural Choice for sensitive stomachs. My boyfriend is going to touch base with the vet and take in a stool sample but in the past they've tested it with no findings. In the meantime, any suggestions for a food switch? Do people think it would help to feed her twice a day instead? Thank you!