Two teenage brothers have been charged with homicide in the death last week of 14-year-old Northewest youth who suffered extensive burns and several fractures in an apartment building fire Jan. 4, D.C. Police reported.

Claibourne Watson, of 1808 8th St. NW, died Feb. 18 at Washington Hospital Center. The D.C. Medical Examiner's Office attributed his death to the burns and pneumonia. He was buried yesterday.

According to police, Watson had said he and the other youths were playing in a vacant apartment at 1709 9th St. NW when the brothers set a mattress afire and threw it against the door of a room he was in, blocking his escape. His clothes caught fire and the brothers fled, police said.

Watson suffered multiple fractures when he leaped from a fourth-floor window of the apartment. He remained in critical condition at the hospital until his death.

Police first charged the two brothers with arson. The charge was changed to homicide after Watson's deaths.

Del. Walter E. Fauntroy (D-D.C.) conducted funeral services for Watson yesterday at Fauntroy's church, the New Bethel Baptist Church, 1739 9th St. NW, where the youth was an active member and choirboy. e, is one of the few American owners and breeders of the dogs, whose history traces back to the Chinese Hung dynasty, when they apparently were bred for fighting.

But now, Albright says, they are docile and friendly - "very good, very clean, very intelligent" house dogs.

Albright has tried to increase his collection, but finding the dogs is not easy. Ads in Chinese newspapers offering up to $750 for a dog have netted few replics.

There are fewer then 100 of the breed in the United States. The Shar-Pei once was recognized by the Hong Kong Kennel Club, but now neither that group nor the American Kennel Club recognizes it. Albright says its will be some time before enough animals are around - about 650 - to begin the lenghty process of certification.