can you not get chicken livers from the freezer section in your supermarkets? they do them quite cheaply,
I too think the lambs liver may be stronger in flavour & the texture will be different.
my friends beg me to make chicken liver pate, and pay me for it. They all have it for their starter on christmas day.
I once substitiuted lambs liver - and it was a disaster!
Well I made it with lambs liver, changed the pineau for Brandy and added fresh mint - can confirm that it was lovely - with two of the guests having seconds :)