Quick summary first...
We live in the middle of nowhere, no neighbours at all. Only people who stop at our drive (other than friends) are postman / binman etc
Pippa our cocker spaniel is nearly 5, soft as anything, and completely adorable BUT she has always barked at people visiting. Now she is a guard dog, but the last 2 weeks her behaviour has gone nuts when someone approaches or a car pulls up. Really barking, aggressive jumping up, shaking the gate etc. and she won't stop on command.
Yesterday she took the biscuit when the meter reading man came and actually went to bite him!
How do I stop this?
As I said she's lovely with us, friends and when she's out it's just this gate thing. She's well, no problems but about to come into heat.
Help!
x