&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.
Seresto is an innovative flea collar made by Bayer for dogs and cats. Seresto protects pets for up to 8 months from fleas, flea eggs, ticks and flea larvae. Buy Seresto collar at 1-800-PetMeds and receive free shipping on orders over $49.