Why dosen't my dog wan't to eat his dog food?

Well first i change my dog food you have to do that to.Cause dogs get bored of the same food over and over again.Example wont you feel bored eating the same food over and over again and its not always good for dogs to eat dry food.epicallyy when it's dry food.For right now i advise you to give him some moist food anything but dry and when he start eating again give him some more before eating dry food again so he doesn't always have to be eating dry food.Thenthat'ss when you can give him dry food again but i advise you to give him some moist food bout 2x a month or more so he knows he's not always eating dry food every month or year.Also let your dog try some other brands of dry food.Glad i could help:)