I started switching Ellie (21 weeks) from Nutro to Innova LB Puppy food last Friday. I started with 1/3 of the new food for the first 3 days, and have been doing 1/2 and 1/2 since Monday. With the exception of the first few weeks we brought her home, Ellie is never too excited about meal time. The first few weeks she was so excited to get her food would follow me running and not looking where she was going . Then one day she just sniffed her food and walked away. Ever since then she'll eat a little and then go back ever few minutes or so. At one point I tried taking her food up after 15 minutes thing, but she still doesn't seem that interested over the next few days. She usually eats it all within the first 1/2 hr to hour. Today is the 3rd day using 1/2 Innova and 1/2 Nutro and she didn't touch the food for about an hour. Her stools are softer than usual, sometimes bordering on runny. Should they firm up soon? I'm afraid to give her 100% of the Innova at this point because of her soft stools. I'm hoping her she doesn't have an upset stomach. Just wondering how long you give the new food before deciding its working? Thanks!