My vet recomended when a dog starts to show no interest in certain meals it a good time to go down one however some its perfectly fine to go down to three if you think your dog can go without four.
Millie became dissinterested in 3 meals last month but has been two ever since and is fine for it. I believe a dog should get two meals a day to keep its energy levels steady though every dog is different i guess.
Another lover of dishwasher though learning not to do it as I hold her collor while I empty the dishwasher and most of the time she will watch same when I open the fridge!
