Choose Options ZENIFEL® Calming Gel Diffuser for Cats £25.95 Choose Options ZENIFEL® Calming Gel Diffuser for Cats £25.95 Ideal for home use, ZENIFEL® Gel Diffusers use feline facial pheromones and are scientifically proven to help reduce stress-related behaviours in cats. They also contains catnip that cats love for high efficacy. ✓ Electric-free: no need for an...