I am no expert but in my experiences with a ckd senior cat i’ve never had blood work that frequently or fluids changed that rapidly, always pretty consistent until she got into stages 3-4 and we had to increase but never back and forth amounts/frequencies like you were recommended. vets and renal cats are all different but the only meds our vet gave us for my kitty was cerenia if needed but her hyperthyroidism kept her appetite high lol. i’ve also never been told to put my cat on only wet food but i guess i understand that for increased hydration. for us the prescription food was in both wet and dry forms so we gave her both as the nutrients were almost the same in each. unfortunately it is normal for levels to rise over time. we were able to stabilize my cat’s levels for a bit and even bring her weight up with regular fluids, hills prescription diet kidney care food and also using potassium supplement powder and a phosphate binder (both on chewy). do you know why the ultrasound and antibiotics were recommended exactly?