
Hi, I usually cut out the midday meal at about that age (and of course increase the morning and evening meals accordingly!) though mine still get a Bonio at lunchtime to 'keep the wolf from the door'! Although it was traditional to only feed dogs once a day, I prefer to feed mine twice, especially as there have been cases of bloat in my breed.
Apparently if you decide to only feed once a day, it is best to give the meal in the morning if you want the dog to be awake and alert at night, and in the evening if you want it to settle down and sleep well at night.
And of course don't exercise too close to a meal (especially if only feeding one large meal a day).
Hope this helps.
:)