@farmerman,
When she comes on heat do you allow evolutionary forces to take their natural course or do you apply theologically motivated precautions. There is no foresight anywhere in evolution. No family planning. No missionary taught techniques.
I presume, in view of her having the run of your library, that she holds a special position in the farm menagerie. A more honorific position in your domestic hierarchy than those reared for consumption and only second to the lady of the house. One assumes she has been trained in the niceties of status relations, the dog I mean, along the lines of the ancient distinctions of worth, honor and repute and readily lends herself to the facilities of a range of invidious comparisons between you and all who have the misfortune to interact with you. Dogs are very like slaves in that they exhibit the gift of unquestioning subservience and are alert to their master's moods and they commend themselves by affording many opportunities for the play of the propensity for mastery which we all know is highly developed in your own person as your avatar so clearly demonstrates.
As you must have noticed with your keen scientific nose, wives also function in a like manner in the patriarchal scheme of things where they act as a sort of advertising hoarding for their owner's capacity to pay and thus put forth to the world his estimable pecuniary worth: the most decorous fashions being those that render the wearer incapacitated for any economically useful effort.
Waste= Status and Use=Odium is a well known scientific law. At the point where Status relations have become a national religion the banking crisis is inevitable. I say religion because it is a fond belief that organisms which fundamentally consist of a tube with a hole at each end can scarcely be differentiated in any other way.
What name have you chosen for your border collie? Does she round up sheep?