Actress Denise Richards is so concerned by the bad behaviour exhibited by her ex-husband Charlie Sheen's twin boys, she has been trying to set up appointments for psychiatric evaluations. The former Bond girl, who has two daughters with Sheen, has been looking after four-year-old Bob and Max - his kids with another ex Brooke Mueller - since their mother was stripped of custody following a drugs bust in May (13), that prompted the troubled reality TV star to check into a rehabilitation facility. Richards recently reached out to officials at the Los Angeles County Department of Children and Family Services (DCFS) to reveal she can no longer take care of the boys as they have allegedly started harming her pet dogs and bullying her girls, reportedly strangling, kicking, scratching, slapping and punching them. Richards expressed fears the temper troubles are connected to the time the twins spent with Mueller, suggesting they frequently turn violent after returning from visits with their mother. Now TMZ.com has obtained an email Richards sent to Dr. Jay Gordon, Assistant Professor of Pediatrics at UCLA Medical School, in August (13), in which she asked to have the kids assessed by child specialists. The message reads: "As we have discussed, because of recent events involving the boys' behavior I think that they need urgent evaluation. I am very concerned about their escalating violent actions; the apparent lack of understanding of the consequences and the safety of others is most worrisome. I would like them seen by Dr. Alessia Gottlieb for a complete developmental and behavioral assessment." However, Mueller has reportedly refused to allow Bob and Max to take part in the medical visits as she fights to regain full custody of the kids - a move which has infuriated Sheen. He has made no secret of his feelings about her custody efforts, recently taking to Twitter.com to rant about child service officials and declare war on Mueller. In his latest bizarre outburst this week (begs04Nov13), he tweeted, "What my family and I are forced to deal with in the last four years, lives outside the pale of any acceptable conduct or decency. I am battling an amorphous enemy that needs to be swiftly disempowered. "These crimes against my children will be exposed. These war criminals will be hanged at dusk to a cheering and jeering crowd... The storm is brewing."