I dont hold the babies with two fingers only. I hold them with the side of my thumb and the index finger in the articulation of the middle phalanx and with all the other fingers holding the neck (body). By doing this I have more control over the babie and you are making less pressure to the neck. It also keeps the babie in a better position IMO. I hope i made myself clear.... I use pinky mice because the pinky rats skin is softer and starts to tear and bleed.