Optagest® is a daily digestive supplement for dogs and cats. This gentle, yet effective formula of the prebiotic organic inulin and four plant-based enzymes supports normal digestion that is sometimes upset by food change, travel, stress, separation or the usual aging process. In addition, Optagest is a complete digestive supplement made with high levels of active ingredients and NO inactive ingredients such as fillers, sugars or preservatives that could further upset sensitive systems.

Available products:

  • 100 and 300-gram bottles
  • Convenience sticks, available in a 60-stick box with stick packets sold individually or in a 7-stick convenience pack

Can’t find Optagest? Try Fresh Digest.

What is the difference between prebiotics and probiotics?

Probiotics are living bacteria, and every animal has his or her own unique strain of beneficial bacteria that will be at its highest level when the animal is healthy. Probiotic supplements introduce a foreign strain of bacteria into the system which are generally sourced from a completely different species, like a cow or a goat.

Optagest works with the body’s natural processes. It contains organic prebiotics which serve as food for friendly bacteria. This targeted feeding promotes a healthy intestinal balance, allowing your pet’s unique, native bacterial strain to thrive.

How do antibiotics interact with prebiotics and probiotics?

Antibiotics are intended to kill any harmful bacteria in the pet’s system. Unfortunately, they often kill the beneficial microbes as well, including any introduced through a probiotic supplement. However, because Optagest contains no living ingredients, it is well-suited to support the digestive tract even during antibiotic use.

Why enzymes?

The natural, plant-based enzymes found in Optagest work from tongue to tail to aid the body in the absorption of nutrients, helping your pet get the most from daily meals.

How does Optagest support a healthy immune system?

70% of the body’s defenses are housed in the digestive tract. Supporting intestinal health with Optagest promotes a strong immune system from the inside out.

My dog has always had a sensitive stomach. Someone suggested Optagest and I tried it I couldn’t believe the results. Not only did her stomach settle down but if I run out of it for a few days, she won’t eat her food. Yes, she’s addicted to it, and I am happy to give it it her. It really works for her.

L. Whitefield

Cranford, NJ

My maltese was having loose stools all the time and I tried everything from Metamucil to sweet potatoes, oatmeal, changing foods, digestive supplements. etc. I tried Optagest, and my dog began having normal stools again. I love this product! It’s also great for “food gulpers” because it breaks down the food for better digestion and absorption! 5 stars!

Stacie R.

My cat (2 years old) was having problems with digestion and hairballs. I just sprinkle a very small amount on his dry food once a day, and he eats it up. What a HUGE difference this made. I love it!


Temple City, CA


Organic inulin, dried Aspergillus oryzae fermentation solubles, dried Rhizopus oryzae fermentation solubles, dried Trichoderma longibrachiatum fermentation solubles.

Guaranteed Analysis per 1/4 teaspoon

  • Moisture (max): 5%
  • Inulin (prebiotic): 700 mg
  • Plant-based enzyme blend: 45 mg
    • Protease (Aspergillus oryzae)*: 18,556 mmoles tyrosine liberated/min/g
    • Amylase (Aspergillus oryzae)*: 2,025 mg starch liberated/min/g
    • Lipase (Rhizopus oryzae)*: 1,033 mmoles fatty acid liberated/min/g
    • Cellulase (Trichoderma longibrachiatum)*: 203 relative fluidity change units of carboxymethylcellulose liberated/5 min/g

*Not recognized as an essential nutrient by the AAFCO Dog and Cat Food Nutrient Profiles

Frequently Asked Questions

Will my dog and cat like the taste of Optagest?

Optagest has no artificial flavors but naturally tastes good to both dogs and cats. In taste test trials, dogs and cats equally found the flavor to be yummy. Your (and your pet’s) satisfaction is 100% guaranteed.

What is the easiest way to give Optagest?

Optagest is a pure powder that can be sprinkled on dry food or mixed into wet or raw food. It’s okay to give Optagest once a day, or if you feed more than once a day, you can split the recommended amount to give a portion with each meal. For an easy option or if your dog or cat is being kenneled and you are feeding dry food, measure out the food and add ¼ tsp. of Optagest per cup of food. Shake to mix. The Optagest is slightly sticky and will adhere to the kibble to make a tasty and healthy coating.

What will Optagest do to help out my pet?

Optagest is a combination of the digestive enzymes used to break down and absorb nutrients in the diet and a prebiotic, the food for the good bacteria native to the digestive system. Optagest is a healthy option for long term use. Since 70% of the immune system is housed in the digestive tract, a healthy digestive system will translate to an overall healthier dog. Things owners might notice are firmer stools, a change in stool color and amount (since the nutrients are absorbed in the body and are not going out with the stool) and a decrease in stool odor and gas due to a decrease in the toxin forming bacteria. All of these attributes are a healthy transition and beneficial for overall health.

Why does my cat’s wet food get soupy with Optagest, and is this a problem?

You are seeing the digestive enzymes that are in Optagest working. With a little moisture, the enzymes will start to digest the food in the bowl.

Should I give Optagest every day or just when there is an obvious digestive problem?

There are lots of benefits for your dog or cat with Optagest every day. With the extra support from the enzymes in Optagest, food is more completely metabolized and more nutrients become available from the food. Optagest also helps to maintain the good bacteria that are so important to digestion. This, in turn, boosts the immune system, so… Optagest every day may be ideal for your pet.

Can I give my pet Optagest when taking an antibiotic?

Yes! When Optagest is given during the course of antibiotic therapy, it helps the friendly bacteria recover any losses and reestablish healthy levels more quickly. Also, when your pet isn’t feeling well, providing extra support with Optagest gives overall support to the immune system as well.

What is the shelf life of Optagest, and does it need refrigeration?

Optagest has a three year shelf life. It’s best to store Optagest away from moisture and heat (118 degrees Fahrenheit destroys enzymes!), but Optagest does not require refrigeration.

What’s the difference between Optagest and Fresh Digest?

The only differences in the Optagest and Fresh Digest products are in the packaging and locations where they are sold. Visit our store locator to find a product near you.

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