I can say that I have never become emotionally attached to the kids in my care, with the exception of one child who is friends with my son. That attachment has only formed after the working relationship was a few years old - he was actually a child i dreaded seeing as an infant
I am not cold or uncaring at all. while the children were at daycare they had a great time and received loving care, but I never once thought of them on my off time or have dwelled on their absence when they left my care.
I guess i just saw it as my job and nothing more, and that's ok!