Cast is redundant. How to use the is statement?

Question

Why is it saying "Cast is redundant"? If I remove the cast it instead says How can I target and use the is statement "toy is Featuer feather" otherwise?

 

Working example: Only says "Cast is redundant" by doesn't through any errors.

if (input == 1 && (object)toy is Feather feather)
{
    Console.WriteLine("ba");
    typeOfToy = feather;
}

Working example: Foreach lets me target the "toy is Feather feather" without any errors. But putting every is statement in a foreach seems overkill?

foreach (var toy in this.toy)
{
    if (input == 1 && toy is Feather feather)
    {
        Console.WriteLine("ba");
        typeOfToy = feather;
    }
}

Not working example: Casting (object) has been removed and through: "An expression of type List cannot be handled by a pattern of type 'Feather'. Why is that and what's the best practise using my two examples above? Any other ways to solve this?

if (input == 1 && toy is Feather feather)
{
    Console.WriteLine("ba");
    typeOfToy = feather;
}