AHEM!....
The Tegu guru Bert Langerwerf has a post on his site saying:
"Important too is the fact that our Argentine tegus do not only eat meat as the Colombian tegus do, but also a lot of fruits, vegetables, cat-foods, and breads."
http://agamainternational.com/pages/tegus.html 'bout 1/3 the way down, for reference...

SO about lazy herpetoculturists feeding dog/cat food?
That's what I thought. In moderation, yes. They're lil pigs, they eat everything.
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Tree hugging is the truest form of self preservation.

G.I.S.Artbiz SLC,Utah