Being against transgenic animals is a form of xenophobia - they have as much right to exist as older species. The additional genetic diversity is fantastic and a great chance to improve nature. If they are inferior they will die on their own, if they are better they will prosper, the most fair outcome. Nature isn't supposed to be a curated and fragile garden.

I'm sure this is only a harbinger of things to come. As genetic engineering becomes cheaper and more accessible, genetically modified animals will become the norm, to the dismay of people obsessed with genetic purity everywhere.