Brooke Mueller Sheen and Charlie Sheen
04/02/2009 AT 03:20 PM EDT
At just over 2 weeks old, Max Sheen is already in the spotlight as questions swirl about why he has yet to leave the L.A. hospital where he was born – along with his brother Bob – on March 14
"Charlie and Brooke's infant son Max remains in the hospital, not because of a heart condition as reported, but because he has not gained the weight necessary to leave the hospital," Sheen's publicist, Stan Rosenfield, says in a statement. "Max is expected to reach the weight requirement shortly and will join his brother at home."
Proud papa Sheen jokes that his son is suffering from a common affliction: aversion to hospital food.
"The weight issue is very common among infants who were born before reaching full term," Sheen says. "I know a lot of people are not fond of hospital food; I just didn't realize that they started so young."
Max and Bob were the first for Sheen, 43, and wife Brooke Mueller Sheen, 31. The Two and a Half Men
actor has daughters, Sam, 4, and Lola, 3, with ex-wife Denise Richards
, and another, 24-year-old Cassandra, from a previous marriage.
"The Sheens appreciate the outpouring of concern," his rep says, "but have assured everyone that both Bob and Max are fine."