The trick to making your dog accustomed to its carrier is making the training process less intimidating. Also, ensure it's a comfortable carrier of the right size for your dog and with enough ventilation. Step 1: With both ends open, leave the carrier on the floor where your dog spends most of the time. Allow them to naturally explore the carrier for a few days and use it as their new "house" if they wish. Step 2: Make the carrier a fun place by placing their favorite stuff, including treats, inside. This makes them comfortable slipping in and out of the carrier. Step 3: Let them explore the carrier with one end closed. Once they get used to this, try zipping up the other end with the dog inside and open it up before they start panicking. Repeat this several times. Ensure you build up a few more seconds of keeping both ends closed with each subsequent attempt. Step 4: Leave them inside the carrier with both ends zipped up and walk around the room as they watch you. Next, lift the carrier gently and give your dog his first ride around the house. Step 5: Lastly, go out in public.