My laki x was about 11 1/2 months old and hed mark a rabbit ,rat fox but he didnt seem two keen to enter earths SO what i did was didnt force him to when my experianced dogs had a fox in a block end id pull the other dog out and put him in and every time this happend i did this and thats how my laki started off and hes coming a very good dog :thumbs-up: