This news article about stray dogs in Arizona got my attention. You might doubt how stroppy a little Chihuahua can be?
Meet Alfie, pictured below latched onto his favourite toy, in defence mode. He’s a Chion, Chihuahua & Papillion mix, so can at least half rampage!
Chihuahuas Rampage in Arizona - ABC News
Chihuahuas are on the loose in an Arizona neighborhood and flooding animal control offices with reports of the roaming strays….

PS: I once heard an Emergency Dept. doctor on a podcast say that while big dogs get all the headlines bites from little ones can inflict just as much damage.