How long does it take for a cat to do external deworming after taking a bath? It is best to deworm internally and externally after three days of bathing, because the skin surface of the cat that has just taken a bath will be relatively fragile. If you use an external insect repellent immediately and drop it on the surface of the skin, the effect will not be that good and it will not be good for cats' skin.
Secondly, try to keep the cat healthy. If you catch a cold the next day after taking a shower, do not perform internal and external deworming for the time being.
After taking a bath, I found that the cat was in good health. This is a very good time to deworm.