If Norman is not able to urinate because of the blockage, you may have to bring him to the vets to have the urine taken out during treatment. But the vitamin C works pretty fast, usually in about 2 days you will see significant improvement, sometimes sooner.
If Norman is not eating, there is injectible vitamin C available but it is for IV use so you will have to have it given at the vets unless you have experience doing so.
>If Norman is not eating, there is injectible vitamin C available but it is for IV use so you will have to have it given at the vets unless you have experience doing so.<
Huntress,
I've only given animals injections under the skin or into muscles, but if you end up having to do this, it isn't that bad. Kitty will forgive you for making an injection faster than for giving a pill! Insulin syringes have such a fine needle kitty may not notice it much.
RouxStir,
I'm thinking the vitamin C acidifies the urine, and makes crystals less likely to form. With a debilitated cat with a lot of waste in the blood and bladder, this sounds good.