I would also agreed with all the above When i had just cheyanne and denver i would leave there food down all day because of the way she ate also she does'nt eat alot . But when i lost denver and got Aspen and then Phoenix i had to separrate there food and feed then 2x a day your other dog will get used to it it took Cheyanne a couple days but she know'now's when it time to eat and she knows that if she does'nt finsh it that she has to wait till the next meal time also i put a little baby food mixed in with it for the first 4 days to get her to eat alittle more and relizing that the food was not always going to be down. It's worked out fine.

If i was to leave out the food now i would have 2 pups the size of the good year blimp LOL

She will eat if she's hungry and if your limiting the time she has it she'll now to eat or she's gonna have to wait might take a couple days but she'll get used to it just fine.