&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.
If your cat has worms, you need to visit the vet. If your cat has any of the signs discussed above, itâs a good idea to do a flea check. Comb through your catâs fur in areas fleas like to hide. Fleas like to hang out around your kittyâs face (they particularly like the ears and cheeks), her belly, armpits, and groin. If your cat is a longhair, you may need the help of a special flea comb.