I've given this scene a lot of thought and it really bothers me. Obviously that pile of ♥♥♥♥ can't be in one sitting, it has like half or a third of the volume of the Triceratops herself. But it doesn't make sense for the ♥♥♥♥ pile to be that tall. Triceratops can be up to nearly 10 feet tall, but that particular Triceratops was not that big. Ian Malcolm was clearly taller than where her anus is, and yet her ♥♥♥♥ pile is taller than him. For that to be possible she would have to walk over her own poop pile so she can poop at the top. But there is no evidence to suggest she stepped on it, there are no foot prints and the ♥♥♥♥ pile would probably crumble. The only logical conclusion I can come to is her ♥♥♥♥ is at the bottom of the pile, where Ellie found the toxic plant the Triceratops ingested, and a larger Triceratops or dinosaur came and took a ♥♥♥♥ on top of it. But I highly doubt that because it was implied this is solely her ♥♥♥♥ pile, otherwise finding what caused her illness would have been a lot more complicated.