Exchequer Leghorn crossed with Sumatra or Fayoumis

[Dean126]

So I ended up with an exchequer Leghorn cockerel. In my flock I have black Sumatras and an Egyptian Fayoumis. I don't know much about chicken genetics so I'm wondering if anybody could enlighten me on what a Leghorn x Sumatra or Leghorn x fayoumis would look like.

Is this a bad idea?

 

[JacinLarkwell]

Pretty sure you would just have black chicks that carried a mottled gene.

Sumatra chicks would have a modified pea comb and the fayoumi chicks would have straight combs