Plexidor Dog Door and Cat Door Installers in Delaware We have installers in the following cities that can install a dog door or cat door for you. Our professional installers will get the job done right. They have experience installing pet doors in wood doors and metal doors. Our installer can install pet doors in all types of walls; stud, concrete block, and yes, they have even put dog doors and cat doors in log walls. Cities with Installers and Resellers of Plexidor Pet Doors in Delaware: Dover, DE Elsmere, DE Harrington, DE Middletown, DE Milford, DE Seaford, DE Smyrna, DE Wilmington, DE Please call us at 800-749-9609 and we will put you in contact with your professional pet door installer. If you do not see your city listed, please call number 800-749-9609 Monday-Friday 10-4. We will find you an installer in your city.