Just having "unformed" bowel movements is not really an indication of anything in particular, that can happen due to a dozen different reasons, as Cooper listed, in addition it could be simply due to him being well-
hydrated. And if the poop has now normalized then it's most likely nothing at all...The question you have to ask yourself whenever something little like this occurs is "Is his appetite normal, is he at all lethargic or sleeping more than usual, or is he avoiding his lights and hiding?" If you see any of these signs/symptoms of illness along with a loose bowel movement and/or any dark colored blood in his bowel movement, then it's an indication that something might be going on...
Be sure to ask the Vet what the counts/loads of each parasite were in the fecal tests BEFORE you medicate him with anything, and be sure to make sure that if any of the parasite counts/loads are in the high range and do require medication that the Vet prescribes the most effective AND least harsh medication available for each parasite that is found in high counts/loads. Totally avoid Ivermectin as a treatment for anything (usually this is given for pinworms if it's given at all), it's poisonous to most all reptiles and will no doubt kill your Dragon, just a head's up. Most Vets know this, but still some don't, a Dragon on the forum died last month due to Ivermectin poisoning given by a Vet who didn't know any better...Panacur is best for pinworms...And also avoid Albon and all other Sulfa Drugs, which are usually given for a high count/load of Coccidia...Albon/Sulfa Drugs are old drugs that are not only very ineffective and usually take more than one round to be effective, but they are extremely harsh and very, very hard on the kidneys of a Dragon. Toltrazuril is the most efficient, effective and least harsh drug for a high count/load of Coccidia in a Dragon...