Cats taking NexGard Combo should be at least 8 weeks old and weigh at least 1.8 pounds. Dosing is based on the cat’s weight.

Dogs and puppies should be at least 8 weeks old and weigh at least 4 pounds (1.8 kilograms) to use either NexGard or NexGard Plus. NexGard Combo is a liquid that you apply to your cat’s skin ...

These treatments can make cats extremely sick ... she might lean more on NexGard Combo. Revolution Plus is easy to apply every 30 days to a cat's skin at the base of the neck between the shoulder ...