my maltese likes to eat her poop. i do not know what is wrong with her. the other day she was running around, and i smelled something. i thought she maybe passed gas b/c hers stink, but i looked around, and she had ate her poop. there was a little mark where the poop had been. someone was in the bathroom, and she could not get in there so she used it in the bedroom. does anybody else's maltese do this? is this normal or do i need to do something? i know this is sick sounding, but please help if you can. thank you.