The animal rights charity has been inundated with calls from evacuees who were not allowed to take their pets with them. Some elderly residents have reportedly chosen to remain amid the rubble rather than leave their animals.
Peta Europe has also sent a letter to Prime Minister Tony Blair, urging him to instruct the Ministry of Defence to help evacuees take their pets with them.
Jason Baker, director of Peta, is in Beirut preparing a rescue mission.
"Many of these animals are small dogs and cats, which could have easily been carried in boxes and placed under seats," he said.