When we talk about manual dog door we generally refer an common flap that installed on to the lower part of the door (usually ground level), which can be made from wood, plastic or metal to let dogs or cats come in and go out freely. Even though manual dog door has plenty of benefits such as cheap and easy to maintain but it also has problems too. That is basically the dog door will have no permanent lock attached on it so this is the good opportunity to let other types of animal to come into the house, which some times they are dangerous such as snake. Moreover, if in your area have some stray dogs and cats around and you are using manual dog door these cats and dogs may come into your house easily. In case if you have a large dog door this will allow other kind of bigger animals come into your house.
