The ones I collected were opportunistic predators and scavengers with a preference for protein sources. They laid a bunch of eggs and then either died off to cannibalism or died from old age were then consumed. Unfortunately, none of the eggs hatched due to an infestation of phorid flies.
I've been breeding Ceuthophilus agassizii for almost 3 years now, but I have yet to get them to reproduce in enough numbers to sell some off, (though that may be due to their small enclosure size, I really should give them an upgrade...). They are very territorial and can be quite cannibalistic, especially the males, I feed them dog food and keep them pretty moist, they have a substrate of coconut fiber and potting soil. For hides I am using egg cartons, bark and dead leaves.