It depends on the moisture content, how long ago they were dropped, the type of food eaten, and several other factors.

I have seen does poop and then went to determine what the food source was and have found some clumped and others broken apart. I have seen bucks poop and when I went to investigate for the type of forage so I could tell where the food supply was have found that poop broken up on occasion.
Here in Fl. deer eat alot of galberries and the poop will sometimes be one large feces instead of pellets.

An old man once told me that for every study done in one geographic location, there is another done somewhere else that has different info. Is he right? I dunno.