> Do you think seasons affect the score of a bitch
Personally I think they may do as statistically bitches score worse than males.
It is probably wise to score between seasons. Personally I feel no hurry to score a bitch as long as it is done in plenty of time before you plan to breed from them.
Just checked and my most recent girl was done at 18 months (had pups at 2 1/2), her half sister 16 months (had litter at 2 years), their mother 17 months (bred from at 3 years 3 months).
Bear in mind in USA you cna only have a preliminary score under 2 years.