Sign of the day: Advice about dealing with politicians edition

What might be slightly more intimidating than even a ferocious guard dog? Maybe this:

Of course, it also doubles as generally helpful life advice.

The sign was on a gate to a field outside the Castle of Dunvegan on the Isle of Skye. Dunvegan professes to be the longest continuously occupied castle in Scotland. It's also the ancestral home to the Clan McLeod, which is descended from Leod – the younger son of Norse king Olaf the Black, according to clan history.

A view of Dunvegan Castle. 

As it turns out, the crest of Clan McLeod includes a bull between the words "hold" and "fast." So it appears the literal threat of the bull was, in fact, bull.