Good evening from a fellow UK-er!!
And welcome, too!
As we both know, the 'breed standards' between our 2 countries are completely different. As are the processes when we go to our vets!
I've had many different breeds of dogs over the years - and what is 'normal' is never really set in stone, whatever one might read or be told. Harry is our first Yorkie though, so I am merely drawing on experience from my mother-in-law, who has always kept them. All of hers have been 'tiny' (we'll call them that, for arguments sake!!
).
All of them have lived happy, fulfilling, energetic, totally wonderful lives - and they've all lived for 15+ years!! So please, please stop worrying - what will be, will be - and enjoy every moment of your little Minnie! Enjoy, and sleep well! Sally + Harry x