Wirt funds most of the project with the savings she's built up over her life. Born in Austria, Wirt studied finance and worked for the Austrian government for several years before starting her own tax-consulting firm. She moved to Costa Rica in 1991, and since 1997, most of her money goes to caring for the dogs who come her way.
She's not rich. Between daily supplies and medical treatment, the bills add up, but that doesn't stop Wirt from living generously.
"I could live a leisurely and also very comfortable life, if I had to just take care of me," she said. "But I do not know how I would live luckier."