Leave her another season pal,give her the chance when i was in my late teens early 20s it would of been down the road, but ive had it twice now in terriers ive bred both of a similar age and there siblings took to it straight away so i was puzzled to this,i left the 1st bitch another 5 months tried her again she turned out a fair bitch, the second dog i had do this occured with a 15mths old dog i left him till he was 2 year old and tried him again and it was the best choice ive ever made hes an absolute corker 110% dog hes now pushing on past 4 and i would not part with the dog for anything h