Bunny Rabbit Death

Okay,So my sister Got a Rabbit,I forgot her name.She was Black&White,And was Young.Not like a baby,like months?.She had a cage,Food and everything she needed.They got her from a pet shop,Im guessing,Maybe a Rabbit Breeder.They had a dog named Nala,Rottie Mix.She would like try to eat her.It was my sisters responsibility to Clean gage,Give her food&Water,etc.So she wouldnt reallly pay any attention to the Rabbit,she would sit to her waste,which could be Like 3in-up in the corner.The cage,was kinda spacuious,But looked uncomfortable.Her water Thing,would have none in it or be Dry half way.Her nails were Overgrown,her white fur on her feet,Tummy was brown.(I remeber her name was bit.)They would run out of Food,and not Buy any for days!! She would have a Heart Attack,when they use the vaccum.She later passes,probably because of her Dirty cage.