Jake Pool had a problem most gardeners wouldn’t even imagine: His baby plants were getting ripped up by wolves. Gray wolves, to be precise. Because Pool is the horticulturalist here at Northwest Trek, and he doesn’t just have the usual Northwest garden challenges of slugs and deer. He’s got bigger animals to deal with. Luckily, he also has animal keepers to help find solutions. “Keepers design enrichment to give animals opportunities to express natural behavior,” says keeper Angela Gibson, who looks after the canines, bears and big cats at Northwest Trek. “For wolves these behaviors include territorial marking, caching, tracking …