I agree with Donrae.
If this is mixed eggs, but pure breeds, you will be able to tell them apart...best bet is to go to the Feathersite.com and look up each breed.
If she means mixed breeds as in roosters are running around with all those hens, then it will be very hard to tell who is who with those genetics.
Cochins have very soft feathering (like a mop), yellow skin (very yellow if bantam), very full feathered foot, single comb, very large if full size, small if bantam.
Silkies are smaller bantams, full feather foot, black skin, 5 toes.
Wyandottes have yellow skin, rose comb, large build, clean legs.
Leghorn, yellow skin, large single comb, medium build, clean legs.
d'Uccle, bantam, with beard and heavy booted feet (feathers)
But if you have mixes, with those genetics, it will be hard to tell who is from who as feathering and walnut and rose combs tend to be dominant, you could end up with some cushion combs which would indicate a walnut+rose heritage...but mostly a mixed breed look that will be hard to tell parentage...honestly, they wouldn't be breeds I would mix as they are a bit of cross purpose....layers with more ornamental types....very heavy types with very light types.
Hopefully she meant a bag of mixed eggs vs. a bag of mixed breeds.
Lofmc
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