This http://www.petco.com/Shop/Product.aspx?sku=1174223
And can I mix this in it too? http://www.petco.com/product/106441/Wellness-Just-for-Puppy-Canned-Food.aspx#details

And I have another question, Should I leave dry food out all day when I'm at school? I don't want my dog to over eat but I don't want my dog to go hungry either.

Thanks!