Facebook is suffering from an overdose of dog food

The company's staff are so ingrained with the network that they can't make products normal people want to use.

"Eat your own dog food", goes the (rather unpalatable) mantra in Silicon Valley. The argument goes that, without your employees using your own products, how can you know for sure that they are something which your customers would want to use? Take, for example, the fact that Google's Eric Schmidt uses a Blackberry instead of an Android smartphone. How can anyone expect the company to have the kind of top-down commitment to greatness which is so often credited with making Steve Jobs years at Apple so successful, if its own executive chairman thinks another company makes better products? And failing to eat your own dog food is also a symptom, as well as a cause, of decline: consider what the difficulties Microsoft had in dealing with the incursion of iPods rather than Zunes into their employee's pockets said about the eventual victor of the MP3 wars.

But Facebook is in the unusual position of having the opposite problem: its employees use the site too much and too well. In eating their own dog food (and nothing but their own dog food), they end up completely unable to imagine how their typical users interact with the site.

Facebook's site can, if you let it, completely manage your life. You can make an event for everything you do, from work meetings to dinner dates; you can use its messaging client like email, right down to being able to take incoming mail to your @facebook.com address; you can use chat, status updates and photo posting to the exclusion of all else (so long Twitter, Gchat and Instagram); you can check in to your favourite restaurants, follow celebrities and even run a business from your page.

A lot of people use a lot of these functions – but how many outside of Facebook's campus use all of them? And how does that affect the products they make?

Take Facebook Home, a total conversion for your Android smartphone into a Facebook machine. It squeezes all of Facebook's services into your phone's homescreen - whether you like them all or not. Use Facebook just for photos and organising the occasional night out? The chat integration will not be particularly useful for your. What is you prefer to tweet good things you've read rather than post them to your wall? You'll have to change the default settings, then.

But the product which really couldn't exist without an overdose of dog food is Facebook Graph Search. That's a product whose advertised use-case relies on users "liking" their dentist. That might be normal behaviour for the people who Mark Zuckerberg hangs out with, but for most, it's just a bit on the odd side.

The reason why graph search in particular is such a flop is simple: the behaviour it encourages to use it is not the same behaviour it takes to make it work. If you want to get the most out of graph search, you don't have to post a single thing on Facebook – but your friends do. That means that simply launching Graph Search onto the world isn't enough to populate it with useful data, and so it's currently best for finding out awkward facts that people might not have meant to make public

Ultimately, Facebook's major engineering problem for the next phase of its life isn't about trying to make it easier and more fun for people to get information out of the site; it's about trying to encourage them to put it in. But that's a problem that they can't tackle with a company full of employees who are only too happy to live their lives on the social network without any encouragement.

Dog food is an important part of a company's diet – but eat too much of it, and you'll get sick.

Photograph: Getty Images

Alex Hern is a technology reporter for the Guardian. He was formerly staff writer at the New Statesman. You should follow Alex on Twitter.

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Want to send a positive Brexit message to Europe? Back Arsene Wenger for England manager

Boris Johnson could make a gesture of goodwill. 

It is hard not to feel some sympathy for Sam Allardyce, who coveted the England job for so many years, before losing it after playing just a single match. Yet Allardyce has only himself to blame and the Football Association were right to move quickly to end his tenure.

There are many candidates for the job. The experience of Alan Pardew and the potential of Eddie Howe make them strong contenders. The FA's reported interest in Ralf Rangner sent most of us scurrying to Google to find out who the little known Leipzig manager is. But the standout contender is Arsenal's French boss Arsene Wenger, 

Would England fans accept a foreign manager? The experience of Sven Goran-Eriksson suggests so, especially when the results are good. Nobody complained about having a Swede in charge the night that England won 5-1 in Munich, though Sven's sides never won the glittering prizes, the Swede proving perhaps too rigidly English in his commitment to the 4-4-2 formation.

Fabio Capello's brief stint was less successful. He never seemed happy in the English game, preferring to give interviews in Italian. That perhaps contributed to his abrupt departure, falling out with his FA bosses after he seemed unable to understand why allegations of racial abuse by the England captain had to be taken seriously by the governing body.

Arsene Wenger could not be more different. Almost unknown when he arrived to "Arsene Who?" headlines two decades ago, he became as much part of North London folklore as all-time great Arsenal and Spurs bosses, Herbert Chapman or Bill Nicholson, his own Invicibles once dominating the premier league without losing a game all season. There has been more frustration since the move from Highbury to the Emirates, but Wenger's track record means he ranks among the greatest managers of the last hundred years - and he could surely do a job for England.

Arsene is a European Anglophile. While the media debate whether or not the FA Cup has lost its place in our hearts, Wenger has no doubt that its magic still matters, which may be why his Arsenal sides have kept on winning it so often. Wenger manages a multinational team but England's football traditions have certainly got under his skin. The Arsenal boss has changed his mind about emulating the continental innovation of a winter break. "I would cry if you changed that", he has said, citing his love of Boxing Day football as part of the popular tradition of English football.

Obviously, the FA must make this decision on football grounds. It is an important one to get right. Fifty years of hurt still haven't stopped us dreaming, but losing to Iceland this summer while watching Wales march to the semi-finals certainly tested any lingering optimism. Wenger was as gutted as anybody. "This is my second country. I was absolutely on my knees when we lost to Iceland. I couldn't believe it" he said.

The man to turn things around must clearly be chosen on merit. But I wonder if our new Foreign Secretary Boris Johnson - albeit more of a rugger man himself - might be tempted to quietly  suggest in the corridors of footballing power that the appointment could play an unlikely role in helping to get the mood music in place which would help to secure the best Brexit deal for Britain, and for Europe too.

Johnson does have one serious bit of unfinished business from the referendum campaign: to persuade his new boss Theresa May that the commitments made to European nationals in Britain must be honoured in full.  The government should speed up its response and put that guarantee in place. 

Nor should that commitment to 3m of our neighbours and friends be made grudgingly.

So Boris should also come out and back Arsene for the England job, as a very good symbolic way to show that we will continue to celebrate the Europeans here who contribute so much to our society.

British negotiators will be watching the twists and turns of the battle for the Elysee Palace, to see whether Alain Juppe, Nicolas Sarkozy end up as President. It is a reminder that other countries face domestic pressures over the negotiations to come too. So the political negotiations will be tough - but we should make sure our social and cultural relations with Europe remain warm.

More than half of Britons voted to leave the political structures of the European Union in June. Most voters on both sides of the referendum had little love of the Brussels institutions, or indeed any understanding of what they do.

But how can we ensure that our European neighbours and friends understand and hear that this was no rejection of them - and that so many of the ways that we engage with our fellow Europeans rom family ties to foreign holidays, the European contributions to making our society that bit better - the baguettes and cappuccinos, cultural links and sporting heroes remain as much loved as ever.

We will see that this weekend when nobody in the golf clubs will be asking who voted Remain and who voted Leave as we cheer on our European team - seven Brits playing in the twelve-strong side, alongside their Spanish, Belgian, German, Irish and Swedish team-mates.

And now another important opportunity to get that message across suddenly presents itself.

Wenger for England. What better post-Brexit commitment to a new Entente Cordiale could we possibly make?

Sunder Katwala is director of British Future and former general secretary of the Fabian Society.