General Discussion
In reply to the discussion: More than 86% of fatal dog attacks are done by this kind of dog: [View all]KurtNYC
(14,549 posts)than the average dog but we would need to know total number of dogs by breed by gender and whether they are neutered.
If we assume that 50% of dogs are female (although I suspect it is higher because more males are put down than females) and that 66% are spayed or neutered then the total population of spayed female dogs is:
total dogs in US: 69.2 mil
x 50% females = 34.6
x 66% spayed = 22.8 mil
This means spayed females of all breeds make up 33% of the total dog population yet they are at MOST 8% of the dogs involved in fatal attacks, and therefore at least 4 times less likely than average to be involved in an attack fatal to humans.
By some estimates pit bulls make up 9.6% of the total dog population, (~20% of impounded dogs and ~30% of euthanized dogs) but I have yet to see stats that show frequency of spaying by breed.
https://www.avma.org/KB/Resources/Statistics/Pages/Market-research-statistics-US-pet-ownership.aspx