Reiko,
I know how you feel. And I work at PetCo.
I started about 2 months ago, I got my beardie about a month and a half ago. When I started I knew 0 about bearded dragons. I purchased my guy, set him up in his 55gallon, had him on Desert Litter, some driftwood, and a 75 watt bulb, no UV striplight, supplements, or anything.
That night I went home and started researching about beardie's. Started with BeardedDragon.org. In that week I got a 50watt bulb, long UV light, calcium and herptivite, and every little thing I could think of. We have a kit at our store for beardies with the wrong supplement, a 150watt bulb, 20inch strip light with the bulb inside prob only reaching 16 inches. Calci sand, and all the other horrible stuff.
I can't really take that stuff out and put in new stuff, but whoever wants to buy a beardie I tell them everything from the cricket size to acidphillis(spell?). I've had a few people listen to my 45 minute speech and say " Forget that, I'll get a hamster"
or another type of small animal)
So what does this mean? Well, basically, and I'm not afraid to admit it.. The people who work at mass pet chainstores really don't care about the animals. It's not like the people at the store I work at don't care about the animals, don't care if they die, don't feed them, it's not like that. They just don't care enough to do some research to better the health of the dragons at their store and the info they give to the customers.
I've had customers get so upset at me because I tell them one thing and someone else said different. Like, a customer a few days ago came in and wanted to buy more Repti-Bark. I ask what it's for, and he tells me a bearded dragon. I say right away change that ASAP, and he freaks out telling me they said it was perfect for him, etc etc etc. I don't want to approach the person who gave this info or anything, I don't want to start anything with them, but that doesn't mean I don't call PetCO's private number for associates and complain.
I try my best to help educate each person who wishes to buy a beardie( and not just beardies, reading about geckos, snakes, birds, and everything else all the time) and sometimes I have managers breathing down my neck wondering why I am telling them different that what everyone else in the store tells them.
I can just keep helping the customers with BD questions as much as I can, and try to educate the employee's who wish to learn. Some don't care really about the animals, and just want the paycheck. I wish I could address your concern and start changing things at PetCo, Reiko, but for now, working just 2 months, and my voice being nothing in this huge company, it's not gonna be easy.