From the Manufacturer:
Every Pet Naturals™ supplement is naturally formulated with the most pure and potent ingredients. L-Theanine is a naturally occurring amino acid that can help support normal chemical balance in the brain, thereby promoting a calming effect without causing drowsiness. Vitamin B1 may aid in calming the central nervous system. Colostrum Calming Complex is derived from proteins that may help support cognitive function and may manage everyday stress.