
The guide line for hip scoring is 1 year, but I was told by a vet that different breeds are thought to have a better score when x-rayed at two years rather than one year. Flatcoats being one such breed. I have all mine scored and have found I do indeed get better scores when they are two years old or over.
Rosebud for example was four when x-rayed she scored 2 - 3 =5 Sally was three she scored 0 - 0 = 0
Lucinda done at three years was 4 - 5 = 9 Trefor x-rayed at three 4 -4 =8 Then I had Darnel at 1 year and one day 8 -8 =16, Sophie x-rayed at 1 year and two months 11 - 18 =29! I agree with Christine, that if the dog is x-rayed at 2 years or more you get a true score, except where there is trauma damage or degenerative damage as in arthritus.
I have also been told that with bitches it is best to score them mid way between seasons as they can get a worse score nearer to, or just after a season.