Now they have had special cages made to protect them from th

Now they have had special cages made to protect them from these monsters.
Now they have had special cages made to protect them from these monsters.
本句我不太懂,但是它可不可以改写成下面的这样呢?
Now they have had special cages to protect them from these monsters.
或者 Now they have had special cages to made to protect them from these monsters.