&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.
Like for dogs, flea comb can also be used for cats. Slowly drag the comb across the hair close to the catâs skin. Comb more in those areas where fleas are likely to hide such as base of the tail, armpits and groin. Keep a bowl of soapy water close to you. As you remove fleas, drown them in this water.