Do you know if there is any correlation between neutering/ spaying rates per breed and attacks?
Here is an article excerpt on the subject - please note that it was published in 2015- I do recommend going to the link and reading the entire article. Thank you for asking.
https://www.animals24-7.org/2015/08/14/does-castration-really-alter-male-dog-behavior/
Does castration really alter male dog behavior?
August 14, 2015 by Merritt Clifton
From 0.5 dead per year in 1960 to 40+ now
More than 70% of the dogs in the U.S. were sterilized by 1991, and more than 80% today, exclusive of pit bulls, among whom the sterilization rate is circa 25% or lower. Pit bulls are now 6% of the U.S. dog population. Dog bites requiring medical treatment have increased to more than 4.5 million per year. Fatalities in the present decade are averaging nearly 40 per year, with an average of 30 inflicted by pit bulls.
SAFER test
ASPCA SAFER food test. (ASPCA photo)
About two-thirds of the fatal and disfiguring dog attacks occurring in the U.S. during the past 33 years have been by pit bulls. The low rate of sterilization among pit bulls contributes mightily to the repeated finding that the majority of fatal and disfiguring dog attacks are by non-castrated male dogs. But about two-thirds of the fatal and disfiguring attacks by castrated male dogs are also by pit bulls.
Particularly telling is that dogs rehomed from animal shelters have killed 38 people from 2010 to mid-2015, all of the dogs either castrated or spayed, and all having passed behavioral screening. Among these dogs have been 30 pit bulls, seven bull mastiffs, two Rottweilers, a Lab who may have been part pit bull, and a husky.