I don't know what's the exact reason behind her black and thin poop,it was just like water. She's 52 days older and yesterday night she wasn't eating her regular puppy food, actually since 4-5 days she wasn't taking interest in that food. SO finally yesterday I decided to give her One boiled egg with removed Yolk and shell and today I saw her poop to be Dark and very slender. Still she isn't eating her regular food but wanting more Eggs and gravy, her behaviour is about normal. But I think she's increased her sleeping hours. Please kindly suggest any solution ASAP!!