My Misa is scared of all cans and if I pick up a coke can or an aerosal he just runs for his life. I know he had a bad life before but Kocka also was scared of aerosals and the noise they made and I have to think that she and maybe Misa were sprayed at one time.
So if the kitten id old enough for spot on frontline that would be best................they dont like that either but the alcohol in the spray makes their fur go all stiff and they smell awful
However if the little thing is covered in fleas the spray is the quickest way.