&middotDrought damage - needles gradually turn yellowish-green and then light brown. This starts at the top of the tree and progresses downward and from the outside in. &middotAnimal injury - dog urine can cause some browning and dropping of lower branches on arborvitae and junipers.
There are many different brands of cat flea collars. Generally, flea collars work by either emitting a toxic gas to the local area (head/neck of the pet) or by exuding chemicals that are absorbed into the animal's skin. Some flea collars have an Insect Growth Regulator (IGR), to prevent development of cat fleas, eggs and larvae.
Use a flea shampoo. However, never use anything that contains Tea Tree oil for cats as it is highly toxic to them! If the bottle mentions D-limonene, Carbaryl or Pyrethrins, I recommend you give it a miss, especially for kittens. Although I donât recommend it, you can use flea collars to kill the fleas on your pet.