&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.
Cats who are particularly sensitive to fleas may develop hair loss during an infestation. Itâs not the fleas themselves that cause hair loss, but their saliva. Flea-based alopecia is particularly evident as patchy hair loss on the catâs hindquarters. Rid your cat of fleas using a cycle of flea shampoos and treatments. You may also treat the itching and hair loss with corticosteroids or antihistamines.