Thanks Vicky. I've no idea what sort of willow it is so I'll leave it.I'm sure that most varieties of willow are safe for piggies but I am aware that there is one type that is poisonous (white willow) so I guess it depends what type of willow you have. Unfortunately I'm not a keen gardener or arborist so I couldn't identify which one is which. Please also be careful as twigs can be sharp and cause injuries to piggies.
they loved when i shook the branch over the run and all the leaves and twigs fell in