Animal shelters must screen their cats for health and temperament, whereas pet adoption ads posted on the Web or in newspapers by individuals are usually unregulated. Adopting a new cat from a shelter is therefore often the best, safest option.
George and Charlie look like brothers, but George is from the animal shelter and Charlie from the Cat Network. They're the same age, and love to sleep together. Of course, they also fight like wolverines when it's playtime!