My dogs are where I last teleported from and I don't know where that is. I've searched the mod in creative and there is no conductor bone to recall them to me. Also, the whistle doesn't open the GUI when I "Shift + Rt Click".

Could you please further clarify your problems ?
What happened when you shift+click the Whistle ? Anything happens ?
Also can you describe how you search ? Like what does it shows ?

Closed as no further information is gathered.