We use the Drs. Foster and Smith Kind. They are Really THICK. and the price is reasonable...
http://www.drsfostersmith.com/produc...&N=2001+113133
We had been using the arm and hammer ones from target when annie was younger with no porblem, and switched back when we ran out of the Drs ones but the Targets are too THIN now Annie will go on them once or twice and then pee next to it the rest of the day... That doesn't work when we aren't home all day
