A savvy dog helped save a man's life and fought off a mugger just a month after being taken in by new owners.

Trixie, a newly-adopted 11-year-old Jack Russell spotted a man who had collapsed in a diabetic coma and pulled her owner to him, leading paramedics to say the dog probably ‘saved the man's life'.

Then just a few days later the plucky Trixie growled and bit a man who tried to steel Georgina's wallet.

(READ the full story from Reuters)