[Harmless Teddy Bear]

I am going to go out on a limb here and say that when you can interbreed and produce fertile offspring you are not a different species.

Just a different breed.

[marktwain]

I am going to go out on a limb here and say that when you can interbreed and produce fertile offspring you are not a different species.

Just a different breed.

Your definition was the standard definition for a species, 45 years ago.

[desertfreedom765]

It also depends if the offspring are fertile. I.E Mules.