I'm gobsmacked...
History of next door is one letter through my door a month or so ago to ask if I would trim my rose bush in back garden as it's grown 8.5 inches above the fence and they can now see it. It's a five foot fence. 
but I did new ( me) neighbourly thing and trimmed it.
This morning there's a note through door again from them , letting me know that they are going to contact the RSPSA and dog warden ( is there such a thing) and report me . A list of complaints were then listed .
These include, letting puppy howl all night, leaving pup alone all day to howl. Letting pup wee against same place on fence , which apparently seeps through and is damaging their vegetables. They are fed up with me shouting at puppy. They don't like the name I've chosen.
They then go on to say they apologise for not stopping to give me a lift ( rural bus service) but they saw I had pup in my bag and didn't want it in their car. But they will be writing a stern letter to the bus company to complain that people shouldn't be allowed on buses with dogs as it's a health hazard.
I'm not sure whether to reply by writing ... or just shout through the letter box that I don't have a ducking dog!! I never have and I don't have any pets. The neighbours either side of me and them have cats. They have cats.
Just what I need ! Should I ignore?