I know I've alluded to this practice somewhere else on this board, but have always wanted to post it here and get some reaction. Just wasn't "brave" enough before...
Before I kept pdfs I was feeding ffs to pygmy leaf chams, and adding the occasional piece of fruit to their viv to keep the ffs happy, mainly when I felt I'd dumped in too many flies at one time. One day I didn't have any fruit so I added a Fluker's Orange Cube instead, which I had on hand for feeding my anoles' crickets. The ffs were quite attracted to the cube and a couple of the chams learned to hang out next to it and pick them off.
Next summer my son went to Panama, and left his pdfs with me, including one pumilio in a temporary container with a damp paper towel on the bottom, philodendron cuttings, & film canisters. Once I dumped too many flies in that
tub and added a cricket cube to that. In a few days I was amazed to see that the frog's feces on the paper towel were surrounded by a little orange halo. This to me indicated that the flies were ingesting something from the cube which was then passing into the frog as well.
One of the reasons I hesitated to post about this was precisely because of the food coloring Fluker obviously uses. It didn't seem like the best thing to feed a frog. But it was a handy indicator of what seemed to be going on.
I continued to use these cubes off and on when I got my own pdfs, my intermedius, which I've had since they were 1-2 months of age and which are now breeding. (Sometimes I still use pieces of fruit, instead. Banana works best...)
One advantage of the cubes over fruit is that they do not rot as fast. In fact, I once had Drosophila
lay eggs in the cube and noticed that my frogs were eating maggots off of it. The frogs do learn to expect flies at the cube, BTW.
Here's the ingredient list from the Fluker's jar label:
INGREDIENTS: Water, Carrageenan, Soya Protein, Maltodextrin, Fructose, Dried Brewer's Yeast, Potassium Sorbate, Dried Kelp, Calcium Carbonate, Spirulina, Ascorbic Acid, Calcium Propionate, Sodium Benzoate, Citric Acid, Yellow #6 Food Color.
Here's a link to the product I'm talking about
http://www.flukerfarms.com/index.asp?Pa ... &ProdID=25
Here are some shots of various cubes in my viv, including a blurry one showing my female stalking a cube for flies: