I'm a P@H fan but I use it for different reasons.

They're not the cheapest but they are convenient.

I wouldn't trust the staff for advice any more than I'd ask a Tesco checkout person how to cook a luxury meal from the ingredients they sold me. That's no disrespect to the staff of either store but that's not in the hiring criteria.

Health questions? ask a vet.
Specific animal questions? ask someone who works with the animals not just someone who sells them.
Need dietary or set up info? Ask any combination of the above.
Want to browse a decent range of pet products from crates to fish food? That's where P@H comes in.