&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.
Most dogs and cats seem to enjoy this treatment. Here is how you can make use of a flea comb to help reduce the flea population on your dog or cat: Firstly, find a quiet place and make your dog or cat feels comfortable. Get ready a bowl of soapy water and put it next to you.