Do Ecco Gore-Tex shoes stretch over time?

I bought a pair of Ecco Gore-Tex hiking shoes, and it's a tiny bit tight (narrow) in my right foot, but fits perfectly to my left foot. If I go 1 size up, then it's too loose in the left foot while fits ok in the right foot. Afaik these shoes are made of yak leather, which according to my Googling, don't stretch much. I was wondering if anyone else have worn Ecco's Gore-Tex line and know if they stretch much over time? If the right foot stretches even a little bit I think it'll be perfect.