Dog
Dogs have served as home security systems since humans first discovered that wolves would trade protection for fire-adjacent sleeping arrangements. The modern dog maintains this tradition with varying degrees of competence, from genuinely intimidating guard breeds to small terriers who believe aggression compensates for physical limitations.
Studies suggest that the presence of a dog reduces burglary risk by approximately 33%, primarily through the deterrent effect of unpredictable barking and the general unpleasantness of confronting an animal whose ancestors were specifically bred to apprehend criminals, badgers, or occasionally both simultaneously.
Toaster
The toaster's security capabilities are entirely passive and largely theoretical. It could, in principle, be hurled at an intruder, though this deployment method voids most warranties and requires proximity to both the appliance and a power source.
Some toasters feature a 'defrost' setting that produces an unexpectedly loud clicking noise, which might momentarily startle a particularly nervous burglar. This represents the full extent of its defensive portfolio.
VERDICT
The dog's evolutionary heritage as a predator, combined with its genuine enthusiasm for announcing the presence of strangers, delivery personnel, and suspicious leaves, provides actual security value. Dog wins decisively at 9-2.