Works amazingly well on my cat that has separation anxiety. We also used it during a house move and it works like magic. We also use the plug in and he’s been a more relaxed and content kitty. When he exhibits bad anxiety or we know he will be in a situation that could cause him stress, we spray it on a cotton pad and wipe his chest and head. Within 15 mins he is calm and we have noticed it lasts about 2 hrs. We just reapply if needed. The smell is quite earthy, but doesn’t last and I’d rather know my cat was relaxed. We have tried other brands and tablets which did not work or had bad side effects. This all natural remedy spray is worth it and we are so happy to have found something that works so well.