Penis
Domestic cats have barbed penises, with about 120–150 one millimeter long backwards-pointing spines. Upon withdrawal of the penis, the spines rake the walls of the female's vagina, which is a trigger for ovulation. Lions also have barbed penises. Male felids urinate backwards by curving the tip of the glans penis backward. When male cheetahs urine-mark their territories, they stand one meter away from a tree or rock surface with the tail raised, pointing the penis either horizontally backward or 60° upward.
Cat cognitive support diets
Recommended DHA and EPA concentrations have not been yet determined for cats in present day. According to AAFCO Dog and Cat Food Nutrient Profiles (2014), DHA and EPA the minimum amount for the growth and reproduction in cat food is 0.0012% on a dry matter basis or 0.03g per 1000 kcal ME per day. Alpha-linolenic acid, was recommended at 0.02% on a dry matter basis and 0.05g per 1000 kcal ME per day.