From Anne Sproule, Ottawa, Canada
I wonder why Ruth Searle writes of surprise that cat owners were found to be more adventurous and unconventional than dog people (6 July, p 43). Just last year, you reported that many cat owners are infected with Toxoplasma gondii, a parasite carried by cats that makes infected animals, including humans, more prone to risky behaviour (4 August 2018, p 17).
