The truth is that a range of sizes will work for the chicken door. The door should be at least 8 inches wide and up to 12 inches tall. My recommendation comes from experience building a coop and the book Poultry House Construction.
Pan-fry a T-bone steak quickly over high heat. Heat the pan on the stove top on high, then place the steak in the center of the pan. This sears one side of the steak almost immediately. Turn the steak after 6 to 8 minutes using tongs so you don't puncture the meat and let the juices escape. Let the steak fry for another 6 to 8 minutes.
Once the grill has heated up you can place the steak on it. Cook the steak for four minutes and then flip it over. Cook the back side for four minutes and then check the steak's internal temperature with a meat thermometer. It should read between 125 and 135 degrees Fahrenheit. well done steak is one that has no red or pink anywhere in it. You must cook the steak a little longer than medium in order to achieve this. Get your grill hot and then place your steak on it. Cook the steak for 12 minutes and then flip it over.