text: hamster has black spots and missing hair please help? my hamster has black spots and is missing her hair, she also is permitting a strange odor, she does sound like she has a little congestion as well.  now the male hamster has black spots under his belly and on his entire private areas. if i were you, i would take them to a vet immediately! that does not sound good. i agree with the second answer. sadly, they will probably die soon. it happens all the time.