How to call method which accepts slice of interface as parameters in golang?

I want to call a method which accepts slice of interface as paramers in golang, but I find that I cannot pass it write as this:

type Base interface {
	Run()
}
type A struct {
	name string
}
func (a *A) Run() {
	fmt.Printf("%s is running\n", a.name)
}
func foo1(b Base) {
	b.Run()
}
func foo2(s []Base) {
	for _, b := range s {
		b.Run()
	}
}
func TestInterface(t *testing.T) {
	dog := &A{name: "a dog"}
	foo1(dog)
	// cat := A{name: "a cat"}
	// foo1(cat)
	s := []*A{dog}
	foo2(s)
}

I get error like this:

cannot use s (type []*A) as type []Base in argument to foo2

If the function takes a []Base parameter, you must pass a []Base parameter. Not a []interface{}, not a []thingThatImplementsBase, but specifically a []Base. A slice of interfaces isn't an interface - it isn't "implemented by" a slice of any other type. The elements of a slice of interfaces can be anything that implements the interface, but the slice itself is of a strict and specific type.