I'm not, to be honest but most online articles and most people who write recipe using dog food say high quality dog food so I had to ask.

Some use too many fillers, some use a lot of preservatives, some use this, others use that. Does it matter, I don't know.

I am one who will ask a question just to get answers like yours! Knowledge isn't very useful if you take the word of one and stop at that!

Only real things I can think of is a ton of wheat and corn in cheap dog food. Does it matter to the roaches, most likely not. Will it matter to the frogs and the animals we feed the roaches to, I don't know.

I don't plan on using dog food. My plan is something like this:
Egg Layer Mash
Oatmeal baby cereal
Pond pellet fish food, because it's the cheapest I have found
Possible ratios:
4:1:1
6:1:2
8:2:4
Will have to see what they like best and how they react to different ratios. It might be more baby cereal or a more even ratio but that is my best guess as to what I will likely try.

But I will admit I may have to add some breakfast cereal to the mix and I like you Rolled oats idea.

Cheap, quick, easy and full of vitamins, minerals and everything I can think of.

Gut Load: Haven't decided if I will change a thing yet. If I do I was thinking I would add some brewers yeast to that mix and possibly some honey and/or molasses to make a nice sweet crumble to make sure they load up.

If I do decide to use dog food, I won't be feeding my dogs food to them! Not at $1+ a pound when I can get other brands for $15 for 40#.

I guess the biggest reason why I asked is because of what a person might consider a quality dog or cat food. My sister thinks O'l Roy is quality food, my dad, Iams, me, Diamond naturals. If I can have 3 different views from my own family, not to mention the ones from friends, I thought it was a good idea to see what everyone thought of as quality dog/cat food. The best top quality dry dog food I can think of is right around $6.50 a pound. Lowest quality, $0.25 cents a pound. Somewhere in between I hope to get an idea of what is considered "quality". Whether it matters or not, having options and different things to try is never a bad thing.