Are you positive they are cecals and not mushy poops? Cecals will be very dark and look like a blackberry or cluster of grapes neatly packed together. Mushy poop can be dark or light but does not have tiny balls formed in it.
Especially in a young bunny, mushy poop can be a sign of coccidia which is easily treated by a vet, but can be fatal if not treated. Two of my bunnies had coccidia when we got them. 10 days of meds and they were set. Plus, the vet used this visit as their pre-op health check and didn’t charge us for an office visit when they were spayed/neutered.
In any case, its always a good idea to have a new bunny seen by a rabbit savvy vet for a checkup. Not only can any health problems be identified and treated early, it also gives you an opportunity to discuss neutering with the vet and any other health questions you may have, AND establishes you as a client so that you have a vet you can call in case of emergency.