Hi!
Please have your boy vet checked to make sure that it is impaction and that it is not caused by another health issue (pain or pressure on the lower gut, like from arthritis in the spine or in the back legs, the pain from a bladder stone/sludge or an internal growth transmitting into the gut, or a large semen rod/infection in the penis shaft, or a hernia in neutered boars pressing on the area of the exit etc.)
Impaction is when the caecotrophs (i.e. the poos containing the undigested fibre that is eaten for a second run through the gut) are no longer compacted/firmed up and expressed properly by weaker muscle power at the exit. It is an incurable progressive process that affects about one tenth of older boars; you should also notice a loss of spring in the step as the weakening musculature does inceasingly impact on the back legs as well (this is usually more noticeable during run time).
Mild impaction can often be improved/temporarily reversed with dietary measures. Please take the time to read our advice in the impaction guide on that score!
However in the longer term your boy will have to be serviced initially every 2-3 days ranging to 2-3 times a day in the later stages. it is unfortunately a very smelly and unpleasant job.
Here is our guide link again; you will hopefully find it helpful as it contains several videos of how to deal with impaction and diet recommendations:
Impaction - How To Help Your Guinea Pig.
