Methods to deal with a cat’s nail that has completely fallen off:

1. First check whether there is bleeding. If there is bleeding, you can use hemostatic powder to sprinkle on the cat’s nail to stop the bleeding.

2. After hemostasis, disinfect with iodophor every day. Disinfection is enough two to three times a day. There is no need to bandage, otherwise it will affect the cat's activities.

3. During the wound healing period, the owner needs to restrict the cat’s behavior, prevent it from playing in water, and adjust its diet. It is recommended to eat a lighter diet.

Precautions for cat nails that fall off completely:

1. Keep it absolutely clean and do not allow bacteria to infect the wound before it heals.

2. Don’t let the cat do strenuous exercise and let it recover from its injuries.