If you have squirrels in your attic space, you will typically hear noises in the morning and again in early evening as the sun begins to set; squirrels will spend most of the day foraging for food and only return for shelter. However, a few weeks after a litter has been birthed, squirrel pups will produce more noise throughout the whole day as they start to test their legs. It is quite common for a squirrel problem to go unnoticed in the early stages until the young start making their presence known. Aside from the physical damage to the eaves in most cases to allow easier entry, squirrels have the same tendency as other rodents to chew through anything plastic. This means they might go after your electrical wiring and pipework, which can result in devastating damage.