i have two westhighland terriers. The male used to live with my sister, we did have a litter off them about a two years ago. but i would like them to have another litter. but since the male came to live with me and the female, he's not interested in her what so ever when she's in season even when she stands willing in her season.  Can anyone explain this.  (they are together twentyfourseven)

Yes, she's too familiar with him.  How fortunate that  the two dogs are a compatible breeding combination  I assume you've checked their respective lines and they were purchased with breeding in mind....

Digger this is a repeat post look on the breeding thread.  :-(