Will my hearing be affected later in life from working with dogs?

I just started working at a dog day care centre on weekends only and every night I come home I notice a slight ringing in my ears. I'm worried that it could give me hearing loss in the future when I am aging...Dogs are constantly barking and it's very difficult to make them stop obviously. Certain dogs have such an extreme shrill like bark and it can be frustrating especially when I am stuck in the house with them for the whole day. Should I use ear plugs to try drown out some of the worst noise? I don't think il be allowed to though since I wont be able to hear instructions properly, it's hard enough trying to hear someone directing me over the top of the noise..? Seriously, can my hearing become damaged?