Fox Valley UltraBoost for Weight Gain

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  • Fox Valley UltraBoost for Weight Gain
  • Fox Valley UltraBoost for Weight Gain
  • Fox Valley UltraBoost for Weight Gain
  • Fox Valley UltraBoost for Weight Gain
$14.95 - $102.95


Calorie and Nutrition Booster

Fox Valley UltraBoost is a premium-quality calorie and nutrition booster for kittens, puppies, and other baby animals that need help gaining weight. Mix UltraBoost with Fox Valley Formulas or mix with solid foods to increase the fat and caloric content in your animal’s diet. Specially-designed to be more digestible, UltraBoost is fortified with vitamins and minerals and won’t dilute any of the nutrients in the formula!

UltraBoost can also be mixed with skim milk powder to make an emergency formula for wildlife. Recommended for orphaned squirrels, flyers, rats, mice, Eastern cottontails, and opossums. 

Fox Valley Formulas

Henry’s is proud to partner with Fox Valley Animal Nutrition, a leading manufacturer of formula milk for endangered and orphaned animals. Fox Valley uses only high-quality human-grade ingredients to create milk replacers that closely match the specific composition of the mother’s milk in order to assure proper nutrition and growth.

Mixing and Storage Guidelines 

As a formula booster: Mix 3 parts formula to 1 part Ultraboost.

As a stand-alone formula: Mix 1 part powder to 2 parts warm water (100°F). Shake well. Blend until powder is dispersed in water. Feed soon after mixing. Store any leftover formula in the fridge and feed within 24 hours. Mixing directions are based on volume, not weight, measurements.

Store any leftover formula in the refrigerator and feed within 24 hours. 

Unused formula powder should be stored in a cool dry place, preferably the refrigerator, and is good until the expiration date printed on the back of the bag.

Made in the USA.

Guaranteed Analysis:

Crude Protein

Min. 25%

Crude Fat

Min. 54%

Crude Fiber

Max. 0%


Max. 7%


Max. 5%

Ingredients: Dried cream (preserved with Tocopherols and ascorbyl palmitate), calcium caseinate, sodium caseinate, whey protein isolate, lecithin, dicalcium phosphate, calcium carbonate, potassium chloride, magnesium sulfate, sodium chloride, choline chloride, vitamin E supplement, vitamin A supplement, vitamin D3 supplement, zinc sulfate, ferrous sulfate, riboflavin supplement, calium panthenate, niacin supplement, manganese sulfate, copper sulfate, vitamin B-12 supplement, thiamine hydrochloride, pyndoxine hydrochloride, folic acid, calcium iodate, biotin, sodium selite.

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24 Reviews

  • 5
    Extra boost

    Posted by Patty Hamilton on 9th Nov 2022

    I foster kittens, often neonatal babies. Many times these kittens come from feral under fed moms, so they do not have a good start. Ultraboost mixed with their formula seems to get the weight on. I do feed fox valley kitten formula, but I mix it with KMR or fostercare because it causes constipation

  • 5

    Posted by Brandy on 10th Aug 2022

    I foster kittens for our local Humane Society and I add this formula if I have kittens that need to gain some weight. It really helps and I have great success with Fox Valley Products with Kittens.

  • 5
    Great calorie booster

    Posted by Joanne Altemeier on 7th Apr 2022

    I love this product . I have used it on neo Nate kittens , sickly kittens , malnourished kittens . It is a great calorie booster . You can mix it with formula , in place of formula , or sprinkled on wet food so it covers all stages of kitten growth

  • 5
    Fox Valley Ultra Boost

    Posted by Vicky Gammill on 9th Mar 2022

    This is the best stuff in the world for helping underweight baby mammals get stronger & more nourishment faster. Love it & use it for all the mammal babies I rehab as a licensed wildlife rehabber for State of Texas.

  • 5
    Life saver!

    Posted by Marie Nichols-Britt on 2nd Nov 2021

    This product has not helped kittens at the Clark County humane and that the Jeffersonville APA gain weight. I bought these products as a gift twice now when I saw we had some failing kittens and both groups report it back to me that this did help them. So I think it’s worth the investment.

  • 5
    Recommend Ultraboost

    Posted by Becca Adams on 19th Apr 2021

    I've been using Fox Valley products for about a year now. Recently I took in an orphaned kitten that was a few days old. At a week of age, I thought she may be developing a blockage because of a lump I felt in her abdomen. Unfortunately, it turned out to be an enlarged non-functioning kidney. Because of this defect, she needed extra support so I began using Ultraboost instead of regular water. This was perfect since Pedialyte goes bad after 48-hours. Saved me a lot of time and money! Highly recommend.

  • 5
    Love Ultraboost

    Posted by MK’s Rescue on 19th Apr 2021

    We love to add Ultraboost to formula for extra calories for our underweight kittens.

  • 5
    Works great

    Posted by Melodie on 8th Oct 2020

    This is awesome have a really small baby squirrel was in such bad shape when I got her and she was not putting on much weight and loose skin all over I started her on the fox valley formula and ultra boost and she has filled out and growing and putting on weight. She is getting really energetic now too at 5 1/2 to 6 weeks old! She is so much fun to watch play!

  • 5

    Posted by Kathy Koenigsdorf on 1st Sep 2020

    My 4-week old squirrels love this added to the regular formula. the shipping was super fast as well.

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