We just began feeding the cats a new dry food about a month ago, Nutro Natural Choice Indoor Adult formula. They split abut 2/3 cup in the morning, and they split a can of wet food at night (different brands and varieties). They were doing good on it when they first switched over (which we did slowly) and now everytime I clean the catbox it's kind of like diarhhea-y. I've read about how the indoor formula doesnt do well with certain cats. Should I give the regular Nutro a try, and if I do, do I do the slow switch like I did before?