Wc bugs are wonderful alternatives to store bought feeders. You are in the perfect situation so that you can catch some for your veiled. I feed wc bugs and so do most of the old timers. Parasites can be present in ANY feeders we feed off to our animals not just wc bugs. That is a myth. Just be sure you can identify all the bugs being offered. I only give my crew: grasshoppers, katydids, stick bugs, moths, and occas mantis. Ive only caught a cpl of mantis. But my guys love the big green hoppers and katydids. If you wanna feed flies I would buy those. You can get clean blue bottle flies from mantisplace.com or from a forum member here: brian/colorcham427. That way your feeding safe clean flies that havent been feeding on cow dung or dog crap. Between flies & wc bugs & hornworms, silkworms, cricks, & dubia you have a lot of options for your animal. He shouldnt get bored of any feeders if you rotate them often enuff.