[...]
>
> 3. The dog was receiving 90 volts of signaling current when the
> number was called.
The dog should move without delay to the UK. 70V RMS here.
4. After a couple of jolts, the dog would start moaning and
> then urinate.
>
> 5. The wet ground would complete the circuit, thus causing the
> phone to ring.
And a very strange expression to cross the dog's face, whilst it quickly crossed its hind legs? Imagine where that current would be flowing while the urine did. *nnn-ghh*
Oddly enough, apparently there really was a case where a dog got zapped by a phone's ringing voltage. IIRC, UK decades ago. The dog received a tingle through its neck, due to faulty wiring and its chain, which set it howling. Liquids were not mentioned.