There's an 800 number on the Kidco website (
www.kidco.com). I bet if you called they could tell you how far apart the bars are....
I have another gate (not this exact one) from Kidco. The slats are about 2 3/4" apart.... My 3lb female could slip through without a problem.... Little sneak.... I went to the hardware store and bought some plastic mesh (looks like the plastic criss cross stuff the small wooden baby gates have on them) and zip ties. I zip tied the plastic mesh to the gate so she couldn't slip through anymore.