My 3 yr old Cuckoo Marens bantam rooster has a swolen vent and seems to be plugged up. I have applied prepH to the inside and outside of his vent. As I was applying the prepH to the inside of his vent I felt gritty poop. I am wondering if I should give him some epsom salt in his water as a laxative. Or give him duramycin 10 in his water for any infection. He is plump and healthy looking now. He had a dirty vent area with no other symptoms. I gave him a bath last night. Any help I can get will be appreciated. Will try to get a picture tomorrow night.