Without further information or context, it's challenging to determine whether this occurrence has any spiritual or supernatural associations. Voodoo, as a religious practice, involves rituals, ceremonies, and beliefs that may incorporate physical objects like charms or talismans. However, finding a plastic bag with teeth does not provide enough evidence to establish a connection to voodoo.
If you are concerned about the presence of animal remains or suspicious items in your vicinity, it's best to handle them with caution and report them to local animal control or law enforcement authorities for further investigation. They will be better equipped to determine the origin and nature of the found items and provide guidance on any necessary steps to take.