&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.
Despite the name, this flea will not only affect dogs, but also cats, humans, and other animals. The dog flea is also commonly found on wild animals, such as raccoons and opossums, and on livestock. Both cat and dog fleas are carriers of the common tapeworm parasite, which affects both dogs and cats.