I never know with TJ. I use litter boxes with pee pads (2 boxes side by side).
Sometimes TJ will go ALL the way in the box and squat or lift his leg high or low. Other times, TJ put his 2 front legs in the box and lifts his legs so the pee either drips inside the box or outside the box. And then there are time that he put 2 feet in one box and the back feet in the other box, then he lifts his leg and pees down the middle of the 2 boxes. When we go for walks outside he does mark certain stuff (it is very rare that he does potty outside, too distracted). TJ was nuetered at 7 months.
I have to put wee wee all rigged up around and under the litter boxes, b/c I was constantly cleaning up pee. TJ is such a littler bugger.
I like the little fire hydrant (sp?) idea, maybe I should try to find one and maybe he will go into the box more often. I don't really care if he squats or lifts his leg, I just want him to go ALL the way into the box and pee!