If they are sticking together it might be cecotropes droppings:
https://www.saveafluff.co.uk/rabbit-info/rabbit-poo
Many miss judge cecotropes droppings for diarrhea, on the link it’s a little about the two different droppings rabbits have.
But it sound quite bad, you need to get your kit to a vet. Does the stomach feel hard, it might indicate gas as the problem, have you changed the pellet when you bought your rabbit.
When rabbits switch pellets or are you feeding the same pellets as the breeder gave the rabbit. If you aren’t then that might be why your rabbit eating habits changed. It’s dangerous changing a rabbits diet especially when they are kits without introducing it slowly to the rabbit. A different kind pellet from before can make the rabbits stomach upset fast. But that’s only if you have changed the diet from what your rabbit was used with before.
Different kind of hay and different kind of pellets, can make a rabbits stomach upset and cause pain if they get gas. My rabbit have those problems when I switch hay or pellets but he’s really sensitive. So every day I feel his stomach and make sure to watch his droppings, for signs that indicate gas in the stomach.