Wow thats gorgeous! really unfortunate that you got the other buds eaten but I would agree with Jeff snails or slugs can do a lot in one night, specially since we've been having so much rain lately, I'll bet a soon as it rains especially at night if you go and walk around your growing are you'll see them come out. Try to get slug bait you will be able to control them if not they will continue to do harm. Good luck