Does anyone have any experience of a pup developing a stunted toe as it matures?

I met a 6 month old miniature poodle pup today which I last saw at the age of about 10 or 11 weeks of age. When I last saw it its toes were normal. In fact I remember remarking on its nice little feet.

Now it has a stunted toe on the inside of one of its front feet. The other feet are all fine. The other toes on the stunted foot are ok although, if anything, I would say that the toe next to the stunted toe looks a little large.The stunted toe is noticeably smaller and the nail is elevated.

The foot doesn't give the pup any trouble in moving. In fact it moves quite nicely.

Its owner insists that it hasn't been stood on or had any accidents.

Has anyone seen this in any breed before?

The only thing I can think of is that it may be polygenetically inherited. Unfortunately the owner doesn't know much about the dogs in the pedigree of her poodle.

Thanks in advance for any info you may have