Usually they cry before they want to potty, Get ur dog out as soon as u see it.... Or when ur dog do potty, repeat GO POTTY till ur dog fifnish it, After ur dog finish it give him a treat... Continue this everytime ur dog do potty...... After a week or so, u just have to tell him once Go Potty, n ur dog will go out n do potty n come back.... SImple :)