How to handle Blue Bottle and Housefly Feeders
Receiving Fly Spikes
I divide the order of Spikes (AKA fly maggots) into small cups like restaurants use for tarter sauce to go orders; they are 1" high, and 1-1/4" high, with a lid.
For each cham, put about 20 in each cup, by pinching out about the same amount of sawdust and spikes into each one. They come packed in sawdust, which helps absorb some of the odor. Place all the cups in the refrigerator, and pull one out every day or so. They will take several days to hatch, so keep pulling them out to get a continuous hatch.
Feeding Time
At feeding time, put the cup of hatching flies in the refrigerator to slow them down, or a SHORTER time in the freezer, (too long in the freezer they die, but it is quicker!). Once the flies are moving slow, put them into a cup with finely ground bee pollen and honey powder (Buy "Yen's Blend" from Mantisplace.com unless you like grinding the pollen with a mortar and pedestal, blenders don't blend it fine enough to stick to the flies), and shake them until they are coated. Bee Pollen without bee powder is not sticky enough to stick to the flies, so Yen's Blend is worth it to me to save the time it takes to grind ingredients by hand.
You can release them in the cage through the lower door, and most will fly up toward the lights. Don't take the top off and leave the cup to hatch in the cage; if you get water in it the pupae and flies die, and it stinks…
Automatic Feeding Cup
If you want to make the small cup an "automatic" feeder, punch a hole in the SIDE of the cup with a paper hole punch-or drill a 1/4 inch hole (misting water will go into the cup if you punch the lid). Cover the hole with painters' tape while in refrigeration and when they are pupating at room temp. When you put the container in the cham cage remove the tape. The flies will continue to hatch and exit for several days. In this automatic feeder system you don't dust the feeders, but you can put a drop of honey in the cup for food, but dusting as prescribed above is much better. Bee pollen and bee powder dusted onto the fly will give you more nutrition than eating honey IMO.
Spikes will continue to hatch for several weeks using the refrigerator method, depending how fresh the spikes were when you received them. Mantisplace.com gets fresh spikes every week, and they have a lot of supplies and feeders too. Rebecca is the definition of customer service.
The movement of flies will motivate your cham to chow down!
Nick