Dona we will never agree on this one!!
The current belief is that Silver has effect on Black only, I accept that you , after many years of seeing it, may be able to tell which Sorrels of your own bloodlines are carrying Silver but this does not mean that Sorrels with lighter manes and tails, or with manes and tails of a certain sort, are doing so. The proof is everywhere in England where, with Silver virtually unknown, there are horses and ponies that have this colouration without any in put from Silver. When I first showed pictures of Rabbit a number of people tried to insist he had Silver, in spite of my
knowing for sure that he does not. Were you to provide proof that you are always right in your assumptions- ie, in the absence of testing, a Silver foal from a Sorrel mare, I would be more than happy to help get the "rules" changed!! (Seriously) As it is we have seen examples on here of Sorrel mares, carrying Silver, who show NO visual clue to it at all, so I am afraid I must stick to my original belief- Silver does not affect Red.
I also stick to my original "diagnosis", I do not this this filly is Silver, I think she is Pangaré- but I would love to see more pictures- preferably of her unclipped as this is most telling.