Fumigation can significantly affect pets, as the chemicals used are highly toxic to animals during and immediately after treatment. All pets, including birds, fish, reptiles, and small mammals, must be removed from the home during fumigation. Fish tanks should be tightly sealed or relocated to ensure no exposure to the fumigants. You should also consider any outdoor pets and their food or water bowls, as these may be exposed if left out during the process. Pets should not return to the home until it is declared safe by the extermination company.