I'm sure this is true. . .I never got to see a Shiba with any small animal other than cats; we didn't have rabbits or squirrels there. But the street dogs (Shiba types) in Japan lived quite happily with the street cats. Most place with street dogs (including the reservations here) don't have many street cats because the dogs kill the cats, but in Japan they lived harmoniously for the most part. Maybe they had an understanding.A primative breed with a very strong prey drive so they can't be off leash unless in a secure fenced off area. Invisible fencing won't work, they will take the hit to get to whatever critter they have decided to kill.