The California Department of Children and Family Services is said to be trying in vain to contact Britney Spears, who is suprisingly inaccessible considering how much the public knows of her whereabouts. Page Six reports that child welfare agency is concerned about her two children, Jayden James, almost three months, and Sean Preston, 15 months. They may be simply following up on an earlier visit after Sean Preston fell from his highchair, but it’s likely they’ve been tipped off by her antics with Paris all over town.

The best news is that Britney’s mom Lynne is said to be watching the kids, because grandparents are usually much more attentive than the help, but they also report that Lynne can’t get in touch with Britney, which probably means that she hasn’t seen her children much lately apart from orchestrated photo-ops.

A source close to the singer said, “The department has been calling Britney trying to set up a meeting with her, so they can check on [Spears' baby sons Sean Preston and Jaden James]. The calls started after this recent bout of bizarre public behavior.”

But they are not the only ones worried about Spears.

Her family is aghast at her all-night partying with Hilton and Davis and were mortified when, on four separate occasions, Spears was shot by paparazzi not wearing any underwear.

The family source said her mother, Lynne, “is very disturbed and has been trying to get a hold of Britney, but she can’t. Lynne, Britney’s brother, Brian, and her dad, Jamie, are very upset and are trying to stage an intervention with [Spears' manager] Larry Rudolph’s help.”

A rep for the Department of Children & Family Services in L.A. didn’t return calls.

But it wouldn’t be the first time the family service agency’s social workers paid a visit to Spears. On April 8, representatives for the department, along with the L.A. County Sheriff’s office, went to the Malibu home Spears shared at the time with hubby Kevin Federline after Sean Preston fell from a high chair and hit his head while he was under the care of a nanny.

Another friend of Spears said it is possible the department is now merely following up on that original visit. But the Spears household has probably become even less stable since April.

The public has yet to get much of an even covered-up glimpse of little Jayden, and at first Britney was said to be waiting to publish his pictures until she brokered a deal with a top magazine. She then was said to want to give the pictures away so K-Fed couldn’t get 1/2 of the profits. Vanity Fair may have rejected an unpaid Suri-like spread for Jayden, but People was interested at one point. It’s clear that Britney isn’t taking Jayden out or spending much time with him in between her busy schedule going out to clubs and flashing poon with her new friends. In fact we’ve seen way more of Britney’s hairless kitty than we have of her newborn child.

At least she’s been seen out with Sean Preston. That’s something.

Header picture of Britney out with Sean Preston at the zoo on her birthday from Celebrity Puke.