Dogs and cats can be particularly sensitive to loud noises such as fireworks. Here, a dog watches an Independence Day parade in Takoma Park, Md., in 2013. Fireworks, barbecues and activities with friends are all staples of the Fourth of July. But for pets and their owners, this holiday weekend may present some added stress. For some pets, especially dogs and cats with particularly noise-sensitive ears, the sound of fireworks can cause intense fear responses. Some pets will go to extremes to hide, others get startled and run away, and general anxiety caused by unexpected loud sounds can have long-lasting effects on animals.