I rescued a 6-week-old kitten this week that had been dumped near a barn. She is in very good health, other than fleas. My state is having a massive flea outbreak due to rain, so bathing in Dawn dish soap isn't working well enough. I do have capstar that I keep on hand, but she is not yet the 2 lb that is recommended. Does anyone know if I can use half of a tablet on a younger kitten?