As you are aware this is a rare and out-of-print publication with no visible sale matches. Dog breed publications do tend to sell well among breed owners. Based on comparables, this can sell for at least $300 - $400. I do encourage you to contact rare book auctions, as they would be able to estimate the sale value for free for you.
Here are some suggestions of companies to contact:
Bauman's Rare Books in Manhattan - http://www.baumanrarebooks.com/
PBA Rare Book Auctions in San Francisco: http://www.pbagalleries.com/
Swann’s Auction Galleries: http://www.swanngalleries.com/bo_oks.cgi
Bloomsbury London: http://www.bloomsburyauctions.com/
Heritage Auctions: www.ha.com
Australian Book Auctions: http://www.australianbookauctions.com/
Dominic Winter Auctions: www.dominic-winter.co.uk/
Bonham’s Book and Manuscripts Dept: www.bonhams.com/departments/BOK/
Contact all of them, if possible for you, regardless of the company location. This will also help you get a consensus opinion on the value and estimates. Approach each one as if you are interested in selling through them. Auction houses take a percentage of the final sale price, so it is in their best interest to sell it for a premium bid.