I saw it happen this way somewhere on youtube and decide to try it. If you've not flowered spots on the bulbs, I think they will flower, then you've to rip of the flowers.
Also, I only saw it been done with the Nobiles.
My Dendrobiums bloom every year and I keep watering and fertilizing continiously once every week. The potting mix is half mid size bark and half spaghum moss. Keep the air flowing and keep the roots humid. But I will certainly try to cut down the furtilizer once the new bulbs mature and try to reduce water with a few of them as test.
Thanks for the info.
Below some pics from, I think, last year.
