Lewine, Edward. "A Dog's Luxe Life", The New York Times (dating the first dog day care in New York to 1987, and noting huge change in how dogs are treated since the 1940s)
pqarchiver.com
pqasb.pqarchiver.com
(3 November 1996). Dog-Lovers of the World, Unite![dead link], Newsday ("Following the lead of the boom in pet care and pet products, dog day-care centers have opened all over the country, from Boston to Louisville to San Francisco, expanding the services offered by dog walkers to include play groups, sofas and chairs to snooze on, and classical music. The tab for this comes high, $75 to $100 for a five-day week, or $6,000 to $8,000 {a year} per dog at a Somerville, Mass., day-care center.")