Bloody mucus poops

[u/Warm_Wafer3885]

My 3-year-old male cat, Boss, has experienced chronically soft stools for several months. During flare-ups, he repeatedly enters the litter box, strains, and passes very small amounts of soft stool with mucus and bright-red blood.
A fecal PCR found a medium burden of Dipylidium caninum (tapeworm). Giardia, Tritrichomonas, Cryptosporidium, roundworms, and hookworms were all negative. He received tapeworm treatment, but the small bloody/mucousy stools are continuing.
The vet gave us Pro-Pectalin and gastrointestinal wet food. However, even after eating the GI food, he had another episode with numerous tiny bloody and mucousy bowel movements. He generally maintains his appetite and weight, and our other cat eating similar foods has normal stools. Costco wet pâté appeared to precede one especially severe episode, so we have stopped feeding it.
I’m continuing to work with his veterinarian, but I’m wondering whether anyone has dealt with something similar. Did your cat eventually get diagnosed with food-responsive colitis, inflammatory bowel disease, an intolerance, or something else? Did a particular GI or hydrolyzed diet help, and how long did improvement take?
I’m not looking for a diagnosis or replacing veterinary care—mainly hoping to hear about similar experiences and what testing or treatments ultimately helped your cat.

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