Howard Stern was left to look after a rambunctious bulldog while wife Beth attended a benefit for Long Island Bulldog Rescue. Spies said Beth was at the reception for artist Chris Collins’ show Top Dogs at Pop Gallery in Soho, but she kept getting calls from Stern, who was home on doggie duty. “They just became foster parents to a 4-year-old rescue bulldog,” said a source. “Beth kept having to jump on her phone because Howard kept asking, ‘What do I do?’ like an anxious new parent.”