Hello von Fear!
Manfred von Richthofen's dog was a brindle colored Great Dane named Moritz. He was purchased in 1916 in Ostend from a Belgian for 5 marks. Moritz was Manfred's constant companion until his death in April 1918.
After his death, Lt. Alfred Gerstenberg adopted Moritz. Gerstenberg served in the cavalry with Manfred and later in the air service and they remained close friends throughout the war. Gerstenberg passed away January 1, 1959.
Hope this helps!
Very Best Regards,
FliegerJG1