I'm anticipating what's safe for rabbits might not be ok for GPs. Or rats, mice, chinchillas.
I've got a pear tree. (they pick at the dead fallen leaves. Survived that)
Neighbours have a weeping willow.
GP1 has deemed the Willow basket hedgehog house is safe to chew.
It might not harm him. I might. It cost me £16.
Only kidding, pet
So, anyone give their animals twigs?