A bit of advice for you border bitch is concentrate on rearing and shaping your pup into a worker. Concentrate on what you have, not what you want and you will do well. If all you want the dog for is rats and rabbits then that's great, and I appreciate that.
But get the idea of breeding out your head, at least for the forseable future. You only have to look at the for sale section on here to see there is more than enough breeding done by inexperienced individuals for the wrong reasons.
If, in time you want another pup, buy one from a well bred well reared litter.
If after rearing a