i dont know if candy has been bred to toffee.

but we know that candy and albino are compatible, which produces the candino, and that toffee and albino are compatible, which produces the toffino. so i strongly suspect that when you breed candy to toffee, you get hatchlings that look identical to candy and toffee.

thats what i think will happen. like when you combine banana and coral glow, or combine butter and lesser, you only get more evidence that they are the same.