I only read the first page of this thread, but I want to clear up some of the false information that sickened me on that page.
1) Rats did not cause the Black Death, Bubonic Plague, Plague of Justinian, or any other plague in human history. The bacteria was carried on fleas which rode on the rats who thrived because of human refuse and after a human religious culling of felines.
2) Rats are extremely good pets, but not ideal for a 10yr old or younger children in general. They are smart, social, interactive animals, they love to be pet, love to cuddle, love to eat, and the owner will need to handle and play with them daily. With proper care, they carry no diseases or infectious agents than a dog or cat.
Rats are not pets. Good as research subjects, not as pets.
Statements like that ^ are just pure, uneducated, stupidity.
3) PetCo gets their animals, rats included, from mills. They are bred indiscriminately in bulk, with no social interaction with humans and minimal veterinary care.
4) This 10 year old kid had a single rat, which any semi-educated rat owner who did 5 minutes of research before buying would know is MAJOR no no. Rats are extremely social animals and its absolutely critical for their mental and physical well being to have a companion.
5) This 10 year old kid wanted to breed Oreo, the name of the pet rat. A child of his age is not responsible enough or financially capable of breeding rats. With an average litter of 8-10 rats of mixed gender, the neuter/spay bill alone would wipe out any savings or allowances he might have. And if he didn't fix them, he would see 'oops' litters from those offspring, and then litters from those offspring, and so on. That doesn't factor in vet bills. For 10 rats with a myco flare up, the vet bill would run close to a 1000 dollars. For me to take a single one of my rats to the vet costs about 100 dollars, and thats only for the exam and an Rx to Baytril.
It honestly doesn't shock me that PetCo's animals had an infection or that they bit him. As I said, the mills they get their rats from offer no human interaction, which coupled with the lack of training and knowledge from the PetCo employee, likely created an intense fear of humans in all their small animals. When their only experience with humans in negative, what do you expect? Hell, I once watched a PetCo employee pick an adult rat up by its tail! The PetCo near me is horrible about cleaning or maintaining their small animal aquariums, last I was in there, their ferret tank had a mound of poo nearly a foot high. Their mice and rat tanks had mixes of both genders, ages, several pregnant females, etc. If a pet store, an pet store, cannot ensure a basic level of care for their animals, they should not be selling them.