It wasn't until the owner was arrested earlier this week that Reggie and Sylvester got out.
"The [superintendent] opened the door, and he was feeding them," Silverstein explained. "They had called animal control, but one of the neighbors, who's one of our fosters, called us, and we stepped in."
Upon Silverstein's advice, the neighbor rushed Reggie and Sylvester to the vet. Both animals were in terrible shape - thin, malnourished, dehydrated. Reggie was at least 40 pounds underweight.