Years ago I mixed peanut butter , chocolate spread and aniseed oil in together. Didn't get a answer if the aniseed was a marked improvement but in loads of old trapping things I've read aniseed (anise) was always mentioned as a powerfull attractant for all animals . Its definitely got a potent smell . It's quite cheap aswell
https://www.amazon.co.uk/NPOW-Star-Anise-Essential-Healing/dp/B0C7SBLK38/ref=mp_s_a_1_1_sspa?crid=27XDTXXPSYNY7&keywords=anise+oil&qid=1701103350&sprefix=anise+%2Caps%2C89&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9zZWFyY2hfYXRm&psc=1