Brian, I love this kind of question because it brings out
deap seated feelings. Since I don't have hens to practice on like Nathan does (I must assume he tried to pull a hen off a nest with a WD-45 or he clearly wouldn't have made such
a statement), so I just consult Nebraska to see which tractor pulled the most weight. That should be fair to make a choice
so you don't need any of Nathan's hens. The maximum drawbar
pull of the WD-45 gasoline was 5441 #. The WD-45 diesel pulled
a maximum of 5908 #. The D-15 maximum was 6157 #. So at least in Nebraska. the D-15 seems to be slightly stronger. Also the testweight of the D-15 was slightly less than either WD-45.
Now if the average hen weighed 3# and could fight like the devil,
it might take 10# to get her off the nest. So a D-15 could pull
off 600 average sized hens. That must be some hen that Nathan has!