So I have taken in a litter of almost 4 week old pups, because the owner said either we take them or he would 'take care of it himself' as he couldnt afford to look after them. I have had them for almost 24 hours now, and so far only one of them has pooped. After every meal I have been trying to stimulate them to poop by gently wiping their bums with a damp wet towel, but so far nothing. The one that did poop did it on his own without any stimulation needed. I have been feeding them on puppy milk replacement every 6 hours (this is approx how often they wake up anyway), and they have no problems weeing either. Am I worrying about nothing, or should I take them to the vet? Or is there something else I need to be doing to help them go?