Worms? What kind are ok to buy?

[Beebulz]

I have a Pacman frog and he eats worms. I buy worms (red wigglers) from the pet stores around here to feed him/her, but they are frequently out of stock and there aren't any small local pet stores in my area that carry feeder insects, they are just dog and cat specialty stores. So I usually have to supplement with gut loaded crickets, which is fine, but I know worms are more nutritious.
My question is- is it ok to go to the store and buy bait worms? If so what kind? I have read to avoid certain ones because they add dyes to them, but I am not sure which ones to look out for. Could I also go get worms from my own yard? I am concerned that worms from outside would have parasites or something... I need advice because my frog loves worms!!

Thanks in advance for anyone's help!

[Mentat]

Interesting it likes Red Wrigglers; they have a foul tasting slime. You can go to Walmart (sport's area) or any local bait store and buy not dyed Night Crawlers. Dyed ones are identified as such and are a fluorescent yellow/greenish color. Normal night crawlers you want are an aged beef meat color .

[Beebulz]

I assume my frog likes the red wigglers, he has been eating them so far and has never spit them out.
The night crawlers will be much easier to find though, thank you, I just wanted to make sure they were ok and not the ones with the dyes in them.

[UncleChester]

You can culture Red Wrigglers, Eisenia fetida, and produce your own supply or at least have some on standby in case your store bought supply runs out. They are used in vermicomposting so you can do double duty by disposing of vegetable waste. There are hundreds of sites with details such as Worm Composting CanadaVermicomposting - Getting Started

[Bombina Bob]

I find it easiest to go worm hunting on a rainy night in the backyard and catch them while they surface. They
are fast little buggers though! If you do attempt this method, collect from a herbicide and pesticide free area

[Beebulz]

I will read up on culturing my own worms, although that might be a little much for me, I probably can find some in my yard if I have no other options.
I don't have neighbors very close and we don't use anything because of my other pets, so there are no pesticides or herbicides used in my area.
Today would have been perfect for worm hunting, it rained all afternoon here. It's too late at night now.

[Bombina Bob]

Usually culturing worms is made more complicated by using drainage systems and several containers. i've kept and bred nightcrawlers in a 5 gallon sterelite container with shredded newspaper being the bedding, its best to have it be the consistency where it clumps together but has no drops come out.