A cat is seen at an animal support center in Oeiras, outskirts of Lisbon, Portugal, on Aug. 8, 2019. An adoption campaign was held to mark the International Cat Day in Oeiras on Thursday. (Photo by Petro Fiuza/Xinhua)

A woman kisses a cat at an animal support center in Oeiras, outskirts of Lisbon, Portugal, on Aug. 8, 2019. An adoption campaign was held to mark the International Cat Day in Oeiras on Thursday. (Photo by Petro Fiuza/Xinhua)

A man holds a cat at an animal support center in Oeiras, outskirts of Lisbon, Portugal, on Aug. 8, 2019. An adoption campaign was held to mark the International Cat Day in Oeiras on Thursday. (Photo by Petro Fiuza/Xinhua)

People visit an animal support center in Oeiras, outskirts of Lisbon, Portugal, on Aug. 8, 2019. An adoption campaign was held to mark the International Cat Day in Oeiras on Thursday. (Photo by Petro Fiuza/Xinhua)