Bagelboy the average herd size in Canada is 85 cows.
http://www.cdc-ccl.gc.ca/CDC/index-eng.php?id=3801
The average herd size in the USA is 223.
https://www.progressivepublish.com/downloads/2017/general/2016-pd-stats-lowres.pdf
New Mexico has the highest average with a herd size of 2100 and the smallest herds are in Pennsylvania and Missouri with an average size of 80.  So where are these mega farms in Canada.  The largest that I know of is in London with around 600 head but those farms are few and far between.  It appears that you are getting your numbers from the air.