Delayed Pooping

Hi everyone,Our names are Mickey and Max and we recently moved to a new house. We are still pretty nervous about the whole thing and even though our human roommates constructed a dog run almost exactly the same size as our old one and are rewarding us when we do our business--(what an odd name for pooping) with praise and treats, we refuse to go for several hours, sometimes not until the next morning following our dinner. Our roommates even get up a few times in the middle of the night to try to get us to go, and we do go eventually, they are worried that we may be hurting our tummies waiting so long to go. We do NOT have abnormal bowel movements, but our roommates can't understand why it takes so long for us to go. We're not particularly concerned, but we hope that someone can reassure our buddies.