The economy may have remained sluggish last year but Americans refused to scrimp on their pets, with animal lovers spending upwards of $53 billion on food, veterinary care, kennels and other services in 2012. That's up 5 percent from 2011, when spending first broke the $50 billion barrier, says the American Pet Products Association, a trade group based in Greenwich, Conn. And APPA President and CEO Bob Vetere predicts another 4 percent gain this year.