Halcyon FE Calming Collar for Cats Vaccine Use within 90 days after

Use within 90 days after first puncture

While not specifically a senior formula

Recognized for official use in interstate animal transport

can be cut to fit box size

Matches with Ribbon Dog Collar and Harness

Halcyon FE Calming Collar for Cats Vaccine Use within 90 days afterHalcyon FE Collar Halcyon contains a unique proprietary pheromone (2M2B) that is clinically proven to be safe and effective in addressing a wide range of behavior issues in cats. Features: Promotes Calmness: Helps with separation anxiety, sound anxiety (loud noises), and travel stress. Long Lasting Effect: Provides continuous support for up to 30 days. Customizable Fit: Fits necks up to 13 inches and can be cut to fit smaller necks. Soothing Lavender