I will usually just try and gently tease out small clumps. But if this won't work for you and you don't feel you can leave it or safely trim it out, a butt bath can be tried in some circumstances, though the clump would need to be given time to soften up in the water. It's also very important everything is done safely and as low stress as possible. And just be aware that in sensitive rabbits or ones with preexisting heart problems, any type of bathing could pose a possible risk of cardiac arrest occurring. So if in doubt at all, consult with a knowledgeable rabbit vet first. It's also very important to thoroughly and safely dry(at low temps), to not leave wet fur and risk possible flystrike.
wabbitwiki.com
What is “Flystrike”? Flystrike is also called ‘myiasis’. It happens when flies lay their eggs on your rabbit, and those eggs hatch out into maggots. Maggots from blowflies: bluebot…
rabbitwelfare.co.uk
The RWAF is keen to put owners in touch with vets that show a greater knowledge of rabbit care through our Rabbit Friendly Vet List. The list is constantly being updated and whilst we haven’t…
rabbitwelfare.co.uk
Is he still producing normal round fecal balls as well? If he is, and this is a reoccurring issue and not just a one off occurrence, this is likely intermittent soft cecotropes. Which if it is reoccurring, wet poop stuck in the fur can also be a risk for flystrike.
Mushy cecotropes can have a variety of causes, but the most common one would be an imbalance in the diet. It can be from not enough fiber from hay being consumed, and/or too many sugars/carbs in the diet. It can also be from a new food introduced into the diet too quickly or a sensitivity to a particular food.
If this is a reoccurring issue, I would suggest removing all fruit from the diet to see if that corrects the problem. If not, other diet changes may be needed, such as reducing nugget amounts. Though if diet changes don't correct the issue or you suspect it's a medical problem and not diet, I would suggest having your rabbit checked by an experienced rabbit vet.
*Please note that it will be helpful to the understanding of this disease if you first read the Care of Rabbits handout [...]
rabbit.org
The healthy functioning of the cecum is critical to the overall health of a rabbit. Gaining an understanding of how [...]
rabbit.org