A nest full of eggs is sometimes enough to intice a brood; especially in silkies (and other "broody type" breeds) but you'll want to make sure she is serious before giving her the eggs you want her to hatch. Has she brooded before? For a 1st timer I would recommend cheap or free eggs just in case. 3-4 LF or 5-6 bantam would be the max I'd try. Check and make sure she can cover them all completely and remove 1 or 2 if needed.I am thinking about letting my silkie sit on some eggs. She hasn't shown any signs of being broody yet, but I was wondering if I put some eggs in there if that would be some encouragement. Also, she is a very small silkie, what would be a good number of large chicken eggs to give her?