A: FIP will cause extreme inflammatory to organs such as Kidney, Liver & etc. When there is no antiviral present to stop the replication of the virus, the virus will continue to replicate. This will slowly cause the organs to stop functioning.

There are 2 types of FIP:

1) Wet FIP - there is fluid builds up in abdomen which creates a pot-bellied appearance, initially it may appear as the cat is getting fat, but overtime it will become obvious that this is not weight gain, but abnormality because rest of the body is getting skinner. this fluid may also build up in the chest part which cause cats difficult to breath. Wet FIP causes damage in blood vessels resulting inflammation and fluid leaking in the abdomen & chest area of the cat(s).

2) Dry FIP causes infection or inflammatory lesion (like ulcer) around the blood vessels. The infection eventually progresses to brain, liver, kidney, skin and/or the lungs. In Dry FIP cats may experience seizures, uncoordinated body movement, jaundice, vomiting and weight lost, and eventually paralysis.

Whichever forms the cat(s) may get affected, vet(s) will usually advice to put the cat to sleep. However there are experimental treatments that has demonstrated very effective results against FIP. GC376 and GS441524. Of the two, GS441524 is a more promising treatment because of the low relapse rate. This blog may be an useful read. https://www.curefip.com/post/what-is-fip