... the other option is cecal pellets which are squishy poops in a cluster formation which smell strongly when squashed.
This image shows cecal poop on the left, and regular poops on the right. Cecal poops are natural, are usually produced at night and usually consumed by the rabbit.
Maybe it's relating to the meaning of words, but I don't regard rabbit's "cecotropes," or the term I use "cecum pellets" to be termed as poop. All ruminants, vegetation eating animals, have provisions for re-chewing the contents of their stomachs which are the specialized brewing chambers for bacteria converting cellulose to glucose. For cows, we refer to cow's chewing their cud. Cow's regurgitate the contents of their cellulose brewing stomach for re chewing and re swallowing into their cellulose brewing stomach. For rabbits, the Cecum is the stomach where cellulose to glucose transformation takes place. The Cecum is located at the juncture of the small intestine and the large intestine. In humans, it's a vestigal organ known as the appendix, in rabbits it's an active major stomach. Like cows, rabbits need to re-chew the contents of their Cecum...however, the Cecum cannot be purged to the mouth since it's at the juncture of the small intestine and the large intestine....so the Cecum is purged through the large intestine and out through the bunnies rectum. I call this the Cecum pellet...more scientific name is cecotropes.
What happens next is important for bunny owners.
The rabbit does not consider a cecum pellet to be poop. They know when it's coming out and will, for a healthy rabbit, immediately turn around and re-ingest the cecum pellet. My past bunny was just 100% with litter box behaviors, but she never went to the litter box when she had a cecum pellet.
The problem I had with Bunny (now passed away) was that she started dropping her cecum pellets on carpets and floors and was not eating them. Poops went into the litter box, but the cecum pellets were appearing on carpets/rugs. And then we'd step on the cecum pellet and it'd stain the carpet/rug. The cecum pellet when smooshed...has a very dark green color...from vegetation...it has a bilious odor...smells like vomit..but it is full of vitamins, enzymes, for the bunny's nutrition. The reason our bunny was not eating her cecum pellets was that she had spinal stenosis. It was painful for her to reach around and eat the cecum pellet as it came out. The vet prescribed Metacam, an anelgesic to relieve back pain and Bunny began once again eating her cecum pellets!!!
For me, I don't regard rabbit cecum pellets, or cecotropes, as being poop even though they come out of the rectum.