I like the video of a man who has CPS at his door the CPS lady said
" I need to come in and see that your kids are alright"
the man replied
"I don't care what you need, Do you have a warrant"
and she didn't and the police who were with her had nothing to say.
Don't let strangers into your house no matter what authority they claim.(unless they have a warrant). I'll see if I can find the link a very instructive video.