Having two different genes (alleles) for a trait, sometimes called hybrid, is
considered-

heterozygous

Explanation:

An allele whose trait always shows up in the organism when the allele is present. ... having two of the same genes for the trait (sometimes called purebred). heterozygous. having two different genes for a trait (sometimes called hybrid).

feral cats are estimated to eat tens of millions of native animals each night in australia