Sometimes I find I have to stay out with mine for like 30 to 45 minutes before they poop...I have a 5 month old and a 2 yr old...Bella goes on command plus I know when she has to do her bussiness...Maybe you could use a command like "go potty" for them to pee and "hurry up" for poop...Thats what I do..Harley has the go potty command, pees everytime than I give him a few minutes and I will say hurry up sometimes he does sometime he don't...if he don't I put him in his play yard for 30 minutes than try again until he goes...I'm surprised that she isn't pooping on her walks, how long are you walking her? My 2 almost always does both on there walks...Hope this helps.
