I don't have another pen at this time. I try to spend about 2hrs with them when I get home and feed them so I stay with her till she goes off to do other things. If I'm there and talking to her she is fine. It takes her about the 2hrs to get full. I just can't spend that time with her in the mornings due to having to get to work. I've been encouraging a few of the ones that seam to have imprinted on me to stick around with her before I leave in the mornings. They do for the most part but I'm sure they don't stick with her for the 2hrs she needs.