Here's a bit regarding relocation taken from the OSPCA website.
Relocated animals are at an extreme disadvantage in a new environment. They have to find food, water and shelter in an unfamiliar territory. There may be territorial disputes between the relocated animal and resident animals that can lead to injury and even death. Relocated animals may also spread disease to the resident wildlife population, therefore causing other animals to become ill and/or die.
In Ontario, it is illegal to trap and relocate animals from the site where they were captured according to the Ministry of Natural Resources' Fish and Wildlife Conservation Act.