&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.
1 Flea allergy is the most common allergic skin disease in the United States. 2  Cats with flea allergy tend to scratch their back ends leading to lesions on the rump, hind legs, tail and belly. 3  Since it takes just one flea to make the cat react, the presence of fleas on the cat may be minimal to absent. Since it takes just one flea to make the cat react, the presence of fleas on the cat may be minimal to absent. 2  Atopy is a reaction to airborne allergens such as pollens, house dust, house dust mites and molds. 3  Cats with atopy tend to scratch their ears and face and tend to chew and lick at their feet.