&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.
At what age can a puppy wear a flea collar? A: The age when a puppy can wear a flea collar depends on the specific brand of flea collar and every owner needs to read the labels on the box to ensure that the flea collar is truly age appropriate. It is also important to check the size requirements for the flea collar.