FORGOT, sorry! :---(

i would =not= leave him out in the same space as the cats, when no one is at home - and i would make doggone sure that the kitties have an escape-valve that the dog cannot slip thru, like a latched door that is slotted open so that the cats can slide thru, but the dog will not fit; or a cat-flap cut into an interior door, or a TALL very sturdy cat tree that is SECURED to the wall and/or ceiling, so that it cannot be knocked-over.

since he is so powerfully attracted by chasing small animals, it is better to be safe than sorry! he may be great with the kitties for a long time, and then one day a cat takes a running fit, racing thru the house in play, and all those cuddly memories of sharing the sofa are just that - memories. a baby-gate may separate the dog + cats when U are home, but that is not safe or sturdy enuf for times when U are not home.

JMO - Ur mileage may vary! ;--)
happy B-Mod,
--- terry

terry pride, APDT-Aus, apdt#1827, CVA, IPDTA, TDF