AusBonsai

Yes they are. ..so frustrating when one of their favorite snacks is fresh Maple foliage...I know it's been discussed before...but little in the way a convincing answers or results with regards to the use of ultrasonic devices...if only these things worked, I would purchase one tomorrow....anybody out there that uses these successfully....? Damn bonsai destroying furry monsters...I used to like them, I now hate them with a passion..

The only reliable method I've found is to physically restrict access. I haven't tried the sonic devices but they are quite good at ignoring 'annoyance' devices when there is succulent young shoots to graze on! I setup an electric fence around my trees which seemed to do the trick! They can still get to them if they are brave enough to come down within dog range though!