Feline MYOS muscle formula for cats muscle atrophy. stock image canister
label on MYOS muscle formula feline canister
cat eating MYOS feline muscle formula from beige bowl with canister nearby

MYOS® Feline Muscle Formula

Regular price$47.99
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As our cats age, it can become heartbreaking to see them struggle with muscle loss. Additionally, many cats are affected by hyperthyroidism, causing a decrease in muscle mass that is tricky to compensate for through a regular diet. Fortetropin® has been shown in multiple clinical studies to accelerate gains in muscle mass, improve mobility and enhance recovery from injury. MYOS supplements your cat's diet without the additional influx of calories.

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Up to 5 lbs 1 scoop (1 g) Daily
5 - 10 lbs 1 scoops (1 g) Daily
10+ lbs 2 scoops (2 g) Daily

Returns & Shipping

Once the product reaches the purchaser, Balto USA reserves the right to refuse a full refund. Balto USA will accept returns or requests for refunds for any product within 30 days of receipt of product. Refunds will only be honored if during the initial fitting the product is determined to be a poor fit, function, and/or the product is affecting the health or healing of the patient. Visual inspection may be required.

The brace must be in resale condition to receive a refund. This means that the brace cannot have hair, wear, dirt, and/or no modifications can have been made to the brace. If the packaging is damaged there will be a 10% restocking fee deducted from that product's refund. After we receive the brace back, we will evaluate its condition and then issue a refund.  Balto USA does not offer refunds for refusal from your pet to wear the product. If the purchaser simply does not want to use the device for reasons other than described above, Balto USA will not issue a refund.

Balto USA will NOT cover the cost of return shipping. If you are needing to exchange your brace, a return mailing label will be provided for you once your request has been approved. To exchange a product, you will need to place your new order online. Once we receive the return or exchange back, we will evaluate its condition and then issue you a refund. Returns and exchanges must be in resale condition to receive a refund.

If for any reason delivery is confirmed by the carrier and the product cannot be found, a police report must be filed before a replacement is sent. If the product is lost by the carrier, Balto USA will file a claim and a replacement will be sent.


Promotion Return Policy: The purchase of any Balto USA product(s) using a promotional code(s) must additionally abide by the Balto USA Promotional Return Policy requirements. If a return is requested, the customer can: a) return promotional item(s) in their original, undamaged packaging with the return of their Balto USA product(s) purchase or b) return only the purchased Balto USA product(s) and have market price of the promotional item(s)* deducted from the refund of payment. In the event that the returned promotional item(s) are found used or damaged upon receiving, the market price of the promotional item(s)* will be deducted from the return of payment.


*KONG Classic Market Price - $13.99

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Full Description


Simple. Natural. Proven. MYOS uses a single, all-natural ingredient called Fortetropin®. No additives or artificial ingredients. Fortetropin® has been shown in multiple clinical studies to accelerate gains in muscle mass, improve mobility and enhance recovery from injury.

100% Safe. Not only is MYOS safe for your cat, but it's safe for you too. We wouldn't feed our cats something that we wouldn't be willing to eat ourselves.

Fortetropin® is an all-natural bioactive composition made from fertilized egg yolks that is processed using a patented process which preserves its biological integrity. Fortetropin® contains various molecules that are clinically proven to build and support muscle health for optimal physical performance, mobility, and vitality. Read a case study about Fortetropin® here and about feline tolerability to Fortretropin® here.

Product Facts

Active Ingredients (per 1 g scoop, included):

  • Fortetropin® — 1 g

Inactive Ingredients: None


  • Store at 15° - 30°C (59° - 86°F)
  • Keep refrigerated after opening


  • For animal use only. Keep out of reach of children. In case of accidental overdose, contact a health professional immediately.
  • Safe use in pregnant animals or animals intended for breeding has not been proven. If animal's condition worsens or does not improve, stop product administration and consult your veterinarian.

Allergens: Egg

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