Some things are worth overnight delivery https://us.feliway.com/ #ObnoxiousVoidKittensOfMastodon
@arclight ah, we had varying success with the plug-in one, because the diffuser that plugs in is not great and can wildly vary the dose rate between units. From memory the cartridge should last about a month, but we had 2 diffusers and one lasted about 3 weeks per cartridge and the other lasted about 6 weeks.
Our vet uses the spray, and does one spray in the exam room for any cat coming in.