After our first trip to Saskatchewan, we vowed never to wait to fill the form out at the border. Print the form out, including the instruction pages, and fill it out prior to arriving at the checkpoint. If I remember correctly, the instructions say for waterfowl to list the number of animals, not weight. We have pre-filled out our forms the last 2 years and have only spent about 5 minutes inside the checkpoint each time (compared to 45 minutes the first year). The agents seem impressed that we had the forethought to do that, glance over the form, and say you're good to go. That being said, I hope I didn't just jinx us!