The problem is that neither mutations nor natural selection can produce a new kind of animal, only variations within a species. Besides to have a new species, you have to have NEW genetic information implanted. Mutations and natural selection take genetic information away from an organism or damages genetic information already inherent in the organism itself.
Genetics is no friend of evolution
All observational science shows devolution of the species, not evolution of the species.
This is true of one generation to another, but what mechanism prevents populations from changing? Be specific.
Evolution assumes that children are always of the same species as their parents. Only in Hollywood do mutations produce a new species.