Currently commercial insect are
primarily raised for rapid growth using the lowest cost ingredients. As a
result insect diets do not contain the same nutrients that wild insects would
naturally consume. Vita-Bug® insects are fed a modified diet to increase their
nutritional content to be more in line with wild insects.
Dusting and Insect Gut-Loading
Insect Dusting – Dusting insects to provide additional nutrients can lead
to inconsistent results since factors such as grooming, the time between
dusting and feeding, the palatability of the dust and the particle size of the
dust itself all effect how much is actually consumed. In a recent study crickets groomed off over 50%
of the dust applied to it within 2.5 minutes (Li et al 2009). So delivering a specific amount of nutrients
is a challenge when relying on dusting.
Insect Gut Loading -While properly formulated gut-loading diets can enhance
the value of feeder insects many commercial gut-loading diets either do not
contain sufficient nutrients, they use the wrong forms of some nutrients or
they are relatively unpalatable meaning the nutrients don’t get eaten (Finke et
al 2005). So again unless the
gut-loading diet is proven through published research it is difficult to
determine if a particular gut-loading diet delivers the right nutrients in the
right form for the insectivore.
After more than 7 years of research
and development the Vita-Bug® process has been created. Vita-Bugs® feeder
insects are grown using a scientifically formulated diet with enhanced nutrient
content that enhances the nutrient content of the insect’s tissues. Vita-Bug® crickets, superworms, mealworms and
waxworms contain nutrients more like those found in wild insects (Finke 2015). It is important to note that this process changes
the internal make-up of the insects so it is NOT an applied process that
quickly “wears off”.
Retinal is a form of Vitamin A, and
as you can see the effect of the Vita-Bug® process begins very quickly. The
reason the small cricket contains more vitamin A is because insects store these
compounds in their eyes and smaller crickets have a proportionally larger eyes
than adult crickets.
Many zoos report that the biggest nutrient
deficiency that they experience is a Vitamin A deficiency. So as you can see
Vita-Bugs® have a Vitamin A/retinal levels comparable to that seen in wild
The below image shows the amount of
Vitamin E in wild caught, commercially raised and Vita-Bug® insects. As you can
see typical commercially raised insects contain little Vitamin E. This is
because Vitamin E is expensive therefore just enough is added to the diet for
the insect to grow correctly but not enough for additional storage. In contrast
as you can see the Vita-Bug® insects have Vitamin E levels similar to that seen
in wild caught insects carrying on the theme of making the nutrient content of
commercial insects more like that of wild insects.
In a study conducted in England with red-eye tree frogs (Agalychnis
callidryas) researchers found that when carotenoids were provided to
tadpoles they had a positive influence on development, adult frog coloration
and reproduction (Oglivy et al 2012).
Additionally when Tomato frogs (Dyscophys
guineti) were fed crickets that were enhanced with various carotenoids they
had a more natural coloration and improved vitamin A status (Brenes Soto and
What are carotenoids? Carotenoids
are naturally occurring compounds that are responsible for the coloration many
of these foods we are eat. The red in tomatoes is the result of a carotenoid
called lycopene, the yellow in corn is from the carotenoids lutein and
zeaxanthin and the orange in carrots is from the carotenoid beta-carotene.
In addition to their role in
enhancing the color of many species of animals, carotenoids also play a role in
immune health in many species of animals and also serve as a source of vitamin
A in both Tomato frogs and Mississippi gopher frogs (Brenes Soto and Dierenfeld,
Ploog et al 2015).
What does all this mean?
For a long time now we have all
heard about premium food choices for dogs and cats, now it’s time for reptiles
and amphibians to have the same options.
It is still important to stress
variety when feeding reptiles and amphibians. For example we can supplement an
insectivore’s diet with more fat by feeding waxworms or mealworms. Most
importantly reptile owners need to understand they still must supplement their
pet’s diet with calcium. Crickets and most other feeder insects do not
accumulate much calcium so an additional calcium source is needed. So how do we
solve this? While dusting and gut-loading are options we think a better way is
to add CalciWorms to their diet.
CalciWorms naturally contain high
levels of calcium which is still needed in the Vita-Bug® diet program. So a
staple diet of Vita-Bug® crickets, superworms or mealworms can be enhanced with
calcium from CalciWorms. So this means that using a correct combination of
Vita-bugs® and Calciworms and providing proper lighting means there is no need
for dusting or gut-loading thereby naturally supplying your reptile with all
the nutrients they need.
A, Dierenfeld ES. 2014. Effect of
dietary carotenoids on Vitamin A status and skin pigmentation in False Tomato
Frogs (Dyscophus guineti). Zoo Biology 33: 544–552.
Eeva T, Helle S and Salminen JP.
2010. Carotenoid composition of invertebrates consumed by two insectivorous
bird species. Journal of Chemical Ecology 36:608-613.
Finke MD. 2002. Complete nutrient
composition of commercially raised invertebrates used as food for insectivores.
Zoo Biology 21: 269-285.
Finke MD, Dunham SU and Kwabi CA. 2005. Evaluation of four dry commercial gut loading
products for improving the calcium content of crickets, Acheta domesticus. Journal
of Herpetological Medicine and Surgery 15:7-12.
Finke MD. 2013. Complete nutrient
content of four species of feeder Insects. Zoo Biology 32:27-36.
Finke MD. 2015. Complete nutrient content of four species of
commercially available feeder insects fed enhanced diets during growth. Zoo Biology (in press).
Li H, Vaughan MJ, Browne RK. 2009. A
complex enrichment diet improves growth and health in the endangered Wyoming
Toad (Bufo baxteri). Zoo Biology
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Livingston S, Lavin SR, Sullivan K, Attard
L and Valdes EV. 2014. Challenges with effective
nutrient supplementation for amphibians: A review of cricket studies. Zoo Biology 33:565–576
Ogilvy V, Preziosi1 RF and Fidgett AL.
2012. A brighter future for frogs? The influence of carotenoids on the health,
development and reproductive success of the red-eye tree frog. Animal
Pennino M, Dierenfeld ES and Behler
J. L. 1991. Retinol, alpha-tocopherol, and proximate nutrient composition of
invertebrates used as food. International Zoo Yearbook 30: 143-149.