They are legal to shoot, if they were protected under the Migratory Bird Act then Americans wouldn't be able to shoot them either

I called Manitoba Conservation about this awhile ago and doves are classified as migratory non-game birds they said that it's legal to shoot them in Manitoba. Here are the facts:
Article VII
Permits to kill any of the above-named birds which, under extraordinary conditions, may become seriously injurious to the agricultural or other interests in any particular community, may be issued by the proper authorities of the High Contracting Powers under suitable regulations prescribed therefor by them respectively, but such permits shall lapse or may be cancelled, at any time when, in the opinion of said authorities, the particular exigency has passed, and no birds killed under this article shall be shipped, sold, or offered for sale.
1. Migratory Game Birds:
Anatidae, or waterfowl (ducks, geese and swans); Gruidae, or cranes (greater and lesser sandhill and whooping cranes); Rallidae, or rails (coots, gallinules and rails); Charadriidae, Haematopodidae, Recurvirostridae, and Scolopacidae, or shorebirds (including plovers and lapwings, oystercatchers, stilts and avocets, and sandpipers and allies);
and Columbidae (doves and wild pigeons).
Some people have no clue what they're talking about