Registration to be yearly renewed.

4. Every such registration shall be deemed to be in force from the day on which the same shall be made until the thirty-first day of March then next ensuing and no longer and shall be in like manner renewed from year to year so long as any such dog shall continue to be kept: Provided, however, that every such registration which shall be made in the month of March in any year shall be deemed to be in force until the thirty-first day of March in the year next ensuing.