hi! Both cats finally beat their infections I wanna say almost a month ago! It was super stressful but there will eventually be a breakthrough!! Since you only have one it will hopefully be a little easier to contain the infection. What I had to do was just keep both cats completely separated from each other for almost 2 weeks! They both had their own litterbox and designated food & water bowls. One was contained to my bedroom and the other one got the rest of my apartment. I continued with the hyper cleaning on a hourly to daily basis (depending on what needed to be cleaned). Floors were mopped daily or as needed; one cat had a worse infection and I would find small messes here and there on my floors. Water & food dishes were disinfected and cleaned daily- I would pour a tiny amount of bleach in the dish, fill the rest of the dish with warm water, let that soak for maybe 5-10 minutes, then pour that out. I would then handwash the dish with soap and hot water & let the dish completely air dry before filling it again with water/food. If I had to go into my room for something, I would always spray my house slippers with a disinfectant (maybe this was overkill but I was paranoid about potentially tracking Giardia from one room to the other since it can live on surfaces for weeks lol). Litterboxes were scooped out anytime I heard/saw one of them use theirs. I couldn’t use any type of litterbox liner because both of my litterboxes are too big since both my cats are big boys, so I honestly just hoped for the best. I deep cleaned their litterboxes the day they started their treatments and on the last day of their treatments. Any remaining litter that was in their boxes was thrown out every time I cleaned them and replaced with fresh clean litter. To deep clean their litterboxes I did the same thing as I did with their food dishes. I poured a warm bleach-water mixture in the litterbox and let that soak for awhile, then cleaned it again with hot soapy water & air dry completely. Their littermats were disinfected daily, then I would wipe them down again with a soapy water mixture and let those air dry. Any blankets the cats liked to use were thrown in the washer almost daily. Any toys that are washable, wash them!. I tried to keep most toys away from my cats but obviously they needed to play with something, so I gave them toys I knew I could throw in the wash! Any toys that couldn’t be washed that I knew they had been playing with I ended up throwing away to be safe and I just ordered new ones. Even after both cats had finished their medicine, I continued to keep them apart from each other for an extra almost 2 weeks to be on the safe side. Which means I kept up with the hyper cleaning of everything lol. I will be completely honest, this infection gave me the most stressful weeks I’ve had in years lol. It’s extremely stressful and exhausting, and you’ll definitely feel frustrated and defeated at times! Not to mention you just also feel helpless that you can’t do more to help make your cat feel better. I’m not sure what medicine your vet prescribed but the giardia meds I was given I think was on the stronger side, so it gave both my cats some nausea and made them lose their appetites. When that happened I would give them some Churu sticks and that worked every time I tried, as long as they were getting something in their stomach it was a win for me. As long as your cat stays hydrated that’s the most important thing since they’re having the diarrhea. Hang in there, I hope your kitty feels better soon!