SENDING A VALENTINE… to someone who is dear to you? That’s just what the people who care for the animals at California’s animal parks do each Feb. 14. But rather than penning a heartfelt missive, the kind we humans might receive via the mail, staff members deliver a variety of treats to the fur-rocking, scale-covered critters they care for, day in and day out. These goodies have been carefully chosen to tempt the animals’ tummies, yes, but also to deliver engagement and enrichment, too, in some cases.