What breed of dog food do you use?

[Toller 42]

Echo eats Nutro's natural choice lamb and rice.
Tango and the doxies eat Nutro max chicken and rice.
Tango used to eat the same as Echo but after a few days she got really sick so then we switched her food and she was much healthier! Tango and the doxies eat the same thing but Tango gets normal sized kibbles and the doxies get the small ones.