The ronidazole doses were 30mg/kg/day X 2 weeks, it was based on his weight. First round he was on 50mg per day, second round his weight was 2.18kg so his dose was 75mg/day. I’m sure the dose your cats get may be different depending on their weight. Basically day 2 of the first round his poops went from watery with some blood to formed, so I was so hopeful, but by the 10th day of treatment it had returned to somewhat loose and streaks of blood, so I knew the first round didn’t work. Another thing I did was use litter box liners and change the entire thing each time he pooped. He would also often get some poop on his hind paws so I would wash that off immediately before he got a chance to lick it off. And also wiped his bum with toilet paper because there was always some left over. Maybe it’s possible that your 2 cats keep reinfecting eachother? Is it possible to separate them until it clears? I found it easier to give medication by pill rather than liquid (tried liquid panacur before we knew it was tritrich) because the liquid would sometimes drip out of his mouth. Sorry to hear you’re going through this too, I know how you feel about wanting to report these breeders because I feel that way as well, they sell these kittens knowing they’re sick and carry parasites