PetArk Calm is the settling formula in Hi Form's canine powder range, in a 200g tub. Like the rest of the range it is a powder you measure onto food rather than a tablet or a chew, which is the format that suits dogs that spit out anything tablet-shaped.
Set expectations honestly. A calming supplement is a support, not a treatment. It has the best chance of helping a dog with mild, situational unsettledness — the dog that struggles with a storm or a car trip. It is not a substitute for behavioural work in a dog with genuine separation distress or noise phobia, and a dog that is panicking needs a vet involved, not a tub of powder.
How to use
Follow the dosing on the tub, scaled to your dog's weight. Mix into food. Give it two to three weeks of consistent daily use before judging whether it is doing anything. Tell your vet what your dog is on, particularly if it is already medicated.
We have not been able to verify the ingredient list or the analysis against the manufacturer's own documentation, so that detail is not reproduced here — read the tub.
See the rest of the range in PetArk.