Can anyone recommend a good dog whistle? I have gone through 3, the third not even lasting to the end of the walk

! It's the PAH variety which screws together so that you can change the pitch. The only problem with it is that because I have it on my keyring, the whole thing unscrews itself in my pocket, in the car, in the street, etc. and falls apart - and I normally don't hear it fall! Its driving me potty

I refuse to keep going back to PAH and keep buying the blessed things. PAH make enough money out of me as it is! Rant over .... ! Any good online sites??? I know you lot won't let me down

Thanks,
Karen