I have been looking for something to stop our terriers barking everytime a bird lands in one of our trees. I read all the reviews and, for a while, decided not to bother.
Yesterday I gave in and bought this one, even though the reviews were terrible, I thought I would give it a chance. It arrived at 8am this morning (fantastic delivery service) and I put it straight to work outside.
The dogs have only barked once! They still wag their tails and run outside but are now ignoring the birds who once taunted them.
Amazing, I don't know if it becasue they are small dogs but it really does work. My suggestion would be to give it a go, we can now look forward to our new puppy arriving and not have to worry about the older dogs teaching the younger one to bark at birds!