Most automatic dog feeders come preassembled with minimal setup required. However, some units do require assembly. Be sure that you know whether or not a product needs to be assembled before purchasing it. The only exceptions to this rule are those products that come as a complete unit where no assembly is required. Then, of course, before buying an automatic food dispenser for your dog, you should always read the instruction manual and warranty policy carefully. If you’re unsure about assembling your new product, it’s best to get expert help.