Tclloyd0812
Crowing
I am by no means a chicken genetic expert considering I usually cross same colors and don't usually experiment too much, and when I do I am not as experienced as some of the BYC members on here are with breeding different crosses. However, I will try to give you my best input if you did end up with a white silkie crossed hen and a black silkie rooster.
I believe you would end up with a lot of variety, since the white one is not considered a pure bred silkie only having 4 toes, the babies would probably have a mix. Some would have 4 toes, some would have 5 toes. Some may would have 4 toes on one foot and 5 on the other. They would mostly all have feathered feet since both of the parents did but if they were crossed with one of the other chicken breeds you said the breeder had you may would end up with a clean footed chick every so often. The combs of the chickens produced from both may would even vary because of the other chicken breeds that could have been crossed with a silkie to make the white one you have.
As far as colors, I read somewhere that you shouldn't cross white with anything but white if you want white chicks, but again I'm not an expert so someone may correct me if that's wrong. I think you would end up with a variety of colors, probably mostly dark colors like the father since white is hard to get (from what I've heard) when you cross a white to a dark color. Not saying you wouldn't get any white colored chicks, and you would also get a lot of black chicks (from my own experience crossing a black polish roo to a white hen).
I would definitely read up on it more and I found this link to a thread a while back talking about crossing a white silkie and a black silkie:
Thread 'Breeding a Black and White Silkie???' https://www.backyardchickens.com/threads/breeding-a-black-and-white-silkie.372761/
I believe you would end up with a lot of variety, since the white one is not considered a pure bred silkie only having 4 toes, the babies would probably have a mix. Some would have 4 toes, some would have 5 toes. Some may would have 4 toes on one foot and 5 on the other. They would mostly all have feathered feet since both of the parents did but if they were crossed with one of the other chicken breeds you said the breeder had you may would end up with a clean footed chick every so often. The combs of the chickens produced from both may would even vary because of the other chicken breeds that could have been crossed with a silkie to make the white one you have.
As far as colors, I read somewhere that you shouldn't cross white with anything but white if you want white chicks, but again I'm not an expert so someone may correct me if that's wrong. I think you would end up with a variety of colors, probably mostly dark colors like the father since white is hard to get (from what I've heard) when you cross a white to a dark color. Not saying you wouldn't get any white colored chicks, and you would also get a lot of black chicks (from my own experience crossing a black polish roo to a white hen).
I would definitely read up on it more and I found this link to a thread a while back talking about crossing a white silkie and a black silkie:
Thread 'Breeding a Black and White Silkie???' https://www.backyardchickens.com/threads/breeding-a-black-and-white-silkie.372761/