The lab I just adopted was being fed once a day. Probably because of man power issues and the number of pets they had to look after. And once a day is probably OK but I am switching to twice a day.
I'm no expert, but I think I would feed some of the Purina One with your new food for a few days.
I'm no expert, but I think I would feed some of the Purina One with your new food for a few days.