That's when you get your hets from a breeding that was done with two het toffees or a visual and a het and not s cross breeding with the albino gene. Get documentation for them and if the offspring don't turn out to be toffees you call up the breeder and get your money back or another animal.
That's one thing about this discovery is it will dilute the toffee gene. So your hets from a clutch of het albino to het toffee or even a visual toffee you won't know what they are het for. You will get normals and hets for albino hets for toffee and double hets. Then as stated before will the visuals produced be albino or toffee and is toffee will they have the same color as a pure blood toffee or if it's albino will it change the appearance of it ect...