I only feed once day -- I'm a morning feeder, after their first walk. I feed them about 2/3rds off what they will get for the whole day, as the rest will be made up for in some dog biscuits or treats now and then; and a biscuit at bedtime so no one is going hours on an empty stomach. Breakfast vanishes in a nanosecond. I've never ever had problems with dogs not eating; if anything the reverse, but honestly you needn't worry if a dog doesn't eat a meal or a few meals. They have systems naturally designed to eat a huge amount and then nothing for days. And as Caraline notes, some dogs just seem to prefer a single meal and lose interest in two. Changing food around in response to non-eating is a slippery slope towards very picky eating as it teaches the dog holding out means 1) lots of cajoling eg attention from humans; and 2) maybe something interesting and new in terms of food, a fine form of entertainment as well. :neutral:
On the other hand, rotating foods every couple of months, or feeding a varied diet, can be good way to get dogs to NOT be picky eaters but happy eaters of just about anything (eg the Garbage Guts Threesome that live in my house and say, send over anything yours aren't eating because we eat EVERYTHING...even if it is truly disgusting! adds Lily).
On the other hand, rotating foods every couple of months, or feeding a varied diet, can be good way to get dogs to NOT be picky eaters but happy eaters of just about anything (eg the Garbage Guts Threesome that live in my house and say, send over anything yours aren't eating because we eat EVERYTHING...even if it is truly disgusting! adds Lily).