Yes, animals in shelter are rejects. If someone wanted the animal, then they wouldn't be in a shelter.

That doesn't mean that the animal is defective, just unwanted.

Yes, animals in shelter are rejects. If someone wanted the animal, then they wouldn't be in a shelter. Once an animal is adopted, it is no longer unwanted (aka a reject).

Although animals could be unwanted because they have an ailment, that's not necessarily the case, but the shelter should be able to tell you the medical history of the animal in case that's something you want to take into consideration when adopting.