Netherlands Study Also Examines Dog-on-Dog Attack Aggression Two European studies examine dog-on-dog attacks and dog-killing aggression. UK Study Abstract United Kingdom - A study from the UK published in 2020 provides a glimpse into the prevalence and characteristics of dog-on-dog attacks in a public space. This study came three years after a UK survey (underwritten by a pet insurance company) estimated that 64,000 dogs are killed annually and over 44,000 suffered s… [Read full blog post]