Some take to rats easily..my little buy,loves mice,and at times,I started him on rat pups about 3 weeks ago and it takes him anywhere from 5 mins to 2 hr to strike the rat pup,a few times he didn't even and the rat pup just died..so today I didntwanna chance anything and bought him a mouse,as soon as the mouse came near him,within 2 seconds he struck. I had a feelinG he wasn't much into rats . It showed today where didn't think twice about striking this mouse.