Sheikh Sa`d al-Shuwayrikh
Using biotechnology to enhance animals and plants is permissible, whether by cloning or by gene manipulation. All of these animals and plants have been made subject to the human being. These techniques serve these objectives.
However, this permission is confined to providing real benefits for human beings, other life forms, or the environment. All malicious uses of such technology are unlawful.
Moreover, these techniques should not be used in a way that mistreats animals and they should never be used just for amusement.
Source: Islam Today