We want to adopt a dog, and plan to keep it outside, in a fenced-in yard. What is the most humane and safest brand of invisible fence?
None. CARE does not recommend invisible fencing, as all brands and kinds present a number of dangerous possibilities. See Invisible Fences for details. In addition, CARE generally insists that a dog be an accepted family member, and not simply left outside by itself in a fenced yard for extended periods of time. See Outside Dog for a thoughtful discussion of this.