I have a question on feeding Dendrobates Lamasi 'Orange' . They spend 70 percent of their time in the top most portion of my 40 gallon vertical. When I feed them fruit flies I try and sprinkle them all over the plants and wood structure in the upper portion so as to be close to their location. A lot of flies end up on the ground or lower plants. I have dusted them in the past but it seems like the flies are able to clean themselves before they start feeding. Am I wasting my time dusting which I know should be done at least several times a week. It just seems like they are not benefiting from this or is there still enough dust left on them? I do find one or two on the ground at times hunting the flies. They are very active and seem to be doing fine.