Can anyone help to get my five month old to stand straight as he has started to stand with his feet out sideways. He is a free standing breed so I'm a bit stuck on how to right it. Is it a growing stage or something else.?

If he stood strait as a baby and now appears narrow across the chest this may well be the reason he now toes out. 

As his chest develops then he should stand with toes straight in front again. 

This is all assuming there is no actual deviation/abnormality in the pasterns.

Have you seen any recent photos of his siblings to see if they have the same problem. Do either of the parents have this too?
It can be a common problem in certain lines.

Let's just hope it is as Brainless has mentioned above and it sorts itself out

Personally I'd look at the diet.

Interesting Goldmali, can you please explain?

For a growing pup, if anything is unbalanced in the diet such as not enough calcium or too much, you can end up with problems like this. I had it happen to a pup of mine, long story but in a nutshell he was fed on a very cheap puppy food and his feet started to turn out at about 8 months of age, whereas his littermates fed higher quality foods were fine.  I spoke to a lot of people then who all mentioned diet. I've since completely changed the way I feed pups and have never had the same problem again -not even with the pup I kept from the same mother in her next litter.

Hmm, my picky princess didn't get a very good diet as a puppy because she was more than 2 years old before she would reliably eat anything, and she is easty-westy. I always assume it was because her legs were bent round wrongly in the womb and it took a few days of me placing them as she crawled for her to stop curling them round and backwards.

>I always assume it was because her legs were bent round wrongly in the womb

Very interesting.......

When I was showing the cavies, I had a baby that looked deformed.  Just as you explain with your dog.  I massaged into the correct position every night in front of the fire.  (Oldendays of course, we had coal fires.)

I used to place the little GP on an old towel, and my toy poodle would drag the towel round after my massage, and the GP didn't even try to move.  After a week of massage, the pig stood up and walked away from the towel.  I had never seen such a disappointed dog.

I always thought it was being crushed too tight in the womb.