Always check with your pharmacist if you're on medications to avoid interactions with herbal supplements. Bach Rescue Remedy is one of my favorite stress products. It's a homeopathically prepared flower essence combination that has been used for people and pets for many years. I have had success treating my cats with it simply by adding four drops to their water bowl. Don't forget that your pets are susceptible to stress and anxiety just like us.
Aromatherapy is a good stress reliever.
Products scented with lavender are relaxing and calming. Aura Cacia recently developed a line of bath salts with herbal extracts and essential oils. Wyndmere makes some fine essential oil blends for stress, among other things. Mix a few drops with a carrier oil like almond or apricot kernel and use as perfume or body oil. April is also National Garden Month, so make plans for flower and vegetable beds.