Cat Box Merge places small cardboard boxes on the playing field. Click on them and the box will disappear, and a cute kitten will appear in its place. Select the new available box below and take out the second same cat. Transfer it to the previous one and get a cat of a new breed. You can move it up onto a row of cozy cat pillows. Get new boxes, print them out, and create new breeds by merging. Merging can be done not only on the field, but also on cat beds in Cat Box Merge. Collect a complete collection of breeds.