Based on the poster showing two cute dogs – a border terrier and a Boston terrier – I had assumed Strays was a (probably lame) kiddie film with a remit to amuse the aforementioned kiddies during the long, long, very long summer holidays, so here’s what I was saying to myself during the opening moments: ‘Christ on a bike, what the hell is this?’ I can now tell you that Strays is vulgar, rude, offensive and disgusting.