Question about cat illness plus persistent diarrhea?

i have 4 cats (ill name them so theres no confusion) Splodge, Dennis Star and Guiness.(first 3 males, last female-all neautured except Splodge,all aged between 1-1 and a half years) we rescued a fifth, Willow,she has now gone to the cats protection league.after rescueing her,we noticed she had SEVERE diarrhea, wattery, mucusy, bloody etc.we treated her with anti biotics, the bllod and mucus cleared up,but diarrhea stayed.she then went to CPL,just before she did Star and Splodge developed diarreah and have both lost a little weight. (dennis doesnt have it-not sure about guiness) all my cats are currently being treated for resputary infections (star for the second time in 3 weeks).Star was due for a blood test for aids& lukemia after the first infection,but at his checkup was fine so vet decided not to do it. i mentioned the diorrhea,and he said because he (and the others) are fine within themselves and happy,theres prob nothing wrong and he perscribed kaogel,but that isnt really having any affect.i dont see how persistant diarrhea CANNOT be a problem.he suggested it could just be stress as i made it clear their diet hasnt been changed or anything,but i dont see how this can be the case.their stools arent watery like Willows were,just very very runny.Willow was later diagnosed with "torrovirus" but our vet has never heared of it (and not many have) i just wondered if anyone has any advice.i simply cannot afford to keep taking each cat to the vet all the time at 拢32 a time! any help will be greatly appreciated!
thankyou

this diarrhea has been going on now for about 2 months or so.

I've included a link that will give you a lot of info on torovirus.

I have an 18-year old cat that has had bouts with sloppy poop his entire life, and let me tell you, it is so, so hard to pinpoint the problem. Currently, the vet has decided that he has IBS as well as pancreas degeneration....he thinks. However, along with it, no matter the reason, comes malabsorption which can cause smelly poop, vitamin deficiency, weight loss, and exacerbates other problems.

If your cats are being treated for infections, the antibiotics will make runny, sloppy poop, so that just might be an offshoot of that.

As cats age their nutritional needs change. Try weaning them to another food.

In any event, I urge you to supplement your cats' diet with psyllium hulls (Metamucil in the US) which you will be able to find at the chemists' under the laxative/diarrhea section. I use a minimum of 1/8 teaspoon with the cat's every meal and it makes a huge, huge difference in firming up his stool. I started him on aggressive program about 8 months ago and he has gained weight, is overall healthier and more alert and interactive, feels WAY better, and I have had merciful relief. Is this a cure? No, but it is an aid. And often when the colon is regulated, other issues resolve themselves or make them easier to treat.

My last suggestion is that they all be tested for a full range of parasites and worms, as these are things a cat can transmit to each other.

Good luck.

Good luck.

the effected cats have a great risk of getting dehydrated and not to mention malnourished b/c if they have constant diarrhea, then their bodies aren't allowing the absorption of vitamins and nutrients they desperately need. I would switch vets or at the least get a second opinion and have them all tested for FIV/FIP/FeLv
Good luck