Thanks for the additional information.
From what you describe I think you are quite correct in that this will be bowel pain, most likely the large bowel (colon). Inflammation in the colon will cause flatulence (gas), pain and usually an intermittent or consistently soft stool. When Beeba has one of these painful events she gets relief after passing a stool so that means that this is a large bowel problem. I really don’t think that this will relate to hair balls. Hair balls issues in cats are common but the signs are usually vomiting or constipation. Pain is not a feature.
We need to consider as a possibility inflammatory bowel disease (IBD). Her signs are reasonably consistent with this condition although we see a lot of variations. IBD is a common problem in cats. It involves inflammation of the colon (large bowel). Most commonly we get pain, diarrhoea, some vomiting and weight loss. Very often there is a history of diet change prior to the first episode. There are a number of causes including food intolerance, food allergy, infection (bacteria or protozoa) and parasites. Beeba has been wormed so that should rule out parasites.
Investigation to determine the cause can be a little protracted and expensive. The correct course of action is first to have a sample of her stool sent to a pathology lab for examination and culture to see if there is any obvious cause. Blood tests, an xray and ultrasound should be done and perhaps even a bowel biopsy. This can all get pricey! However in most cases it’s reasonable to first try some simple fixes first. Diet modification is a good start. We don’t know what diet she was put on but maybe it was a “hair ball diet”…that would not settle down IBD. There are a few prescription diets designed for this. They are low irritant and low allergy. An example is Hill’s Sensitive Stomach but there are a number of these and your vet will have his/her preference. You would need to use this for a week for any response and it’s important to not feed anything else. I will also usually use a course of metronidazole which is an “antibiotic” effective against protozoan infections a common cause of colitis in cats. This medication also has an immunomodulatory effect and that can sometimes be involved. Other medications can also be used including cortisone and immunosuppressive drugs but I am reluctant to go to that extent without a full diagnostic process.
Whereas I suspect IBD there are other possibilities but a diagnosis is needed before any treatment can be prescribed so that means the diagnostic process would have to be followed. But if your vet has not already considered IBD you should discuss this possibility with him/her and ask about trying the diet and metronidazole option. The latter must be done in consultation with your vet of course.
This article (click here) will give you a good description of IBD. It’s a veterinary information site with quality comment.
I hope I’ve been of help. Please contact me back if I can assist further.
Kindest regards XXXXX XXXXX luck, Peter