Hello,
I would call your vet and discuss this with them. I suspect the diarrhea is causing constant straining and this is causing the prolapse. So I would ask about something for pain and get the diarrhea under control.
At my clinic I would talk about trying gabapentin or a steroid and adding a probiotic. Or ask for a second opinion from a feline specialist. Also ask about diagnostics available. Like a fecal or maldigestion profile.
Hello,
I tend to stick with the old faithful king toys. Always pick a size larger than the diameter of the neck. Just so swallowing is not possible.
Thank you!