How long is teething?

What is a good cat chew? my stray/feral cat loves to chew on things. 14-16 month persian? How long do they teethe for?

My cats love the C.E.T feline dental chews, though you may have to check with your vet to get them.

Some cats just like to chew and never outgrow it, my cat Spirit loves plastic she never eats it just flosses with it. One of the cats at my work, E-Z, loves to chew cardboard and chew into dogfood bags which doesn't help sell the food.