Cats: Water-Based Diffusion is recommended for use of Hormone Blend with cats.
Dogs: Hormone Blend can be used in a variety of ways for dogs.
Horses & Large Animals: In general, Petting Techniques are most commonly used with the Hormone Blend. Place 3-10 drops into your hands, rub them together and pet onto the back, chest, and/or abdomen as needed. For some animals, applying over the mid to lower back area (where the ovaries would be located) is a good area to concentrate on application. Apply up to daily, or as needed.
The essential oils within the Hormone Blend can certainly help to balance hormones and hormonal behaviors, whether excessive or inadequate in nature. What the Hormone Blend will NOT do, is to alter normal body activity and behavior. So, sorry to tell you, it will not stop your cat from going through a heat cycle. While it may reduce behaviors somewhat, you are pretty much stuck with a cat going through heat every 2 weeks during breeding seasons, until they are bred or spayed. This is a normal body function, and it would be unhealthy for a natural product to stop Mother Nature so rudely.
Situations where we do see Hormone Blend shine: reducing excessive egg laying in companion birds, aiding passage of an egg, restoring normal egg laying cycles in Chickens, reducing hormonal screaming, picking, and mutilating behaviors in companion birds, encouraging normal heat cycles and patterns, supporting healthy and normal conception and pregnancy, reducing false pregnancies, and even for situations such as cranky mares and cystic ovaries.
Chickens: With Chickens, place 1 drop into your hand. Rub the oil onto your finger tips, and massage onto the feet, and especially in the area of ankle (the reproductive reflexology points). Application up to every day to twice a day can be used, however many do great with an application approximately every 3 days. A water mist can also be used to mist nesting boxes and the coop for a diffuser effect of the blend. This blend is also made into a water mist for use on companion birds, and can be applied to Chickens in this manner as well, as long as their environment supports being wet (for example, we wouldn't water mist them in the middle of winter!)
Hormones. We all have them. Unfortunately, in the animal kingdom, they are not always welcomed. Most of the problems our animal friends encounter are man-made however. From birds getting improper light cycles, to dog being put on processed diets deficient in live nutrients - you can bet humans mess with hormones more than just your basic spay or neuter surgery.