(noun) a dog fancier. Cynophiles often participate in dog shows and dog sports. They may prefer owning purebred dogs who have a pedigree, rather than adopting mongrels from shelters, but this is by no means always true. They may be annoyingly obsessive about their dogs, spending exorbitant amounts of money on them, or may simply consider dogs ideal companions.
My friend is a real cynophile; he takes his dog to compete in conformation shows, the kind they show on Animal Planet.