&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.
Interested in Natural Tick and Flea Control and Prevention that really works? You should try the Amber Flea and Tick Collar with Adjustable Chain for Dogs and Cats! This Amber Flea and Tick Collar Review is based on my experience over the past 2 months for my 2 German Shepherds. The collar is adjustable. There are several sizes and it is for both dogs and cats.