I was fascinated by this as Mr. Jameson stated his rabbits moved in Pennsylvania. The question is what kind of rabbits you have in California, as around the Great Plains, we have cottontail and jack rabbits, or had jacks, until they got a disease back around 97 and wiped them out. They never moved a great deal, and our cottontails do not move at all, as they occupy the shelterbelts and rarely go on a walk to other areas.
Your bunnies are chewing waterlines because they are thirsty as rubber is not in their diet and I doubt it was contaminated with the kinds of food they eat in storage.
From my experience here with jacks and cottontails, both will respond to fox sets. They were a nuisance in trapping when there were allot of them. I think it was the fox urine, but in those days I was using Garold Weilands Big Deuce which was skunk based call too. I doubt as you are in California that rodent poison is an alternative in closed feeding stations that birds could not see.
You do though have a number of rabbit species.
Eight species of rabbits and hares occur in California.
Pygmy rabbit, Brachylagus idahoensis (CDFW special concern, harvest)
Snowshoe hare, Lepus americanus (harvest)
Oregon snowshoe hare, L. americanus klamathensis (CDFW special concern)
Sierra Nevada snowshoe hare, L. americanus tahoensis (CDFW special concern; endemic)
Black-tailed jackrabbit, Lepus californicus (harvest)
San Diego black-tailed jackrabbit, L. californicus bennettii (CDFW special concern; endemic)
White-tailed jackrabbit, Lepus townsendii (CDFW special concern, harvest)
European rabbit, Oryctolagus cuniculus (introduced)
Desert cottontail, Sylvilagus audubonii (harvest)
Brush rabbit, Sylvilagus bachmani (harvest, except for endangered Riparian subspecies)
Riparian brush rabbit, S. bachmani riparius (CDFW special concern; endemic)
Mountain cottontail, Sylvilagus nuttallii (harvest)