Many animal lovers have already heard of Esther: she-s the 650 lb. rescue pig with 1.5 million followers on Facebook and Instagram. She also made her -dads,- Jenkins and Walter, animal activist celebrities: they opened an animal rescue farm after adopting her and, along with Crane, wrote an adult memoir about Esther. With the help of Doerrfeld-s cheery, straightforward cartooning, Esther-s story becomes a sweet domestic comedy, as much about besotted parental love as it is about life with a behemoth pig. Esther can-t help that she needs increasingly bigger beds (-We thought she was supposed to be a mini pig,- say her fathers, who do and say everything together). But Esther can do no wrong, even when she does: each transgressive episode ends with the hearts-embellished refrain, -She looked up at her dads with those eyes and that smile... it was love.- An Esther-goes-missing subplot in the final pages feels unnecessary-there-s plenty of narrative fodder in a pig who takes over a family. Ages 4-8. Author-s agent: Erica Spellman Silverman, Trident Media Group. Illustrator-s agent: Rachel Orr, Prospect Agency. (Mar.)