Officials in Essa Township, about 100 kilometres north of Toronto, say emergency crews have been fetching the animals as well as any key medications left in the battered homes.
About 100 homes were damaged in Angus, a community within the township, when the twister struck late Tuesday afternoon. Three people also suffered minor injuries.
Residents have been asked to stay out of their homes while authorities assess the damage, and some have expressed frustration over the wait.
Essa Township Mayor Terry Dowdall says everyone is working as fast as they can to ensure people can go home.
Another town hall meeting is scheduled this afternoon so residents can air their concerns.