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
$14.95 - $45.95


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
    I love this product!

    Posted by Tonya Bottgr on 27th Aug 2020

    This product works so well in helping our abandoned, underweight kittens gain weight!

  • 5
    Saved my 18 year old cats life

    Posted by Jodi on 22nd Aug 2020

    My sweet 18 year old Lulu developed a bad infection that affected her nasal passages. Everything I tried to slowly syringe feed her made her gag. With one last attempt before I had to have her hospitalized with I feeding tube I tried this. I also purchased the miracle nipple/syringe and some bene-bac plus. She loves the ultra boost feedings, I don’t even have to hold her head. She’s slowly starting to put back on weight, has more energy and has perfect kidney function after her last set of labs. My vet is beyond impressed how well she is improving. Beyond grateful to see Lulu getting better thanks to these incredible products. Saved her life, Thank you!!!

  • 5
    Switched from KMR + KMR 2nd Step

    Posted by Wendy Wolfe on 10th Jul 2020

    I originally ordered 1 bag of kitten formula and 1 bag of Ultraboost. After a couple feedings I immediately ordered a bunch more and several other products to have on hand. I added the probiotic because my little ones were on antibiotics but will continue adding it even when they're done with meds. I ordered the anti diarrhea product and the electrolyte replacer too. If all the other products are this good i want those on hand. Anyone who cares for kittens regularly knows diarrhea and dehydration happen occasionally and you want to remedy it as quickly as possible. I feel confident I have everything I need now. Since I switched to Fox Valley formula and Ultraboost I haven't had to deal with constipation, diarrhea., vomiting or bloating. I imagine I will get the occasional very sick kitten but no longer from formula issues.

  • 5

    Posted by Lisa Beardsworth on 19th Jun 2020

    smells good and mixes easily with the formula. Replace 1/4 of the dried formula powder and mix with this. Use this in place of creamer.

  • 5
    Weight Gainer for Rodents!

    Posted by Emily H on 31st May 2020

    What a terrific product! It is so easy to add a dash of cream to squirrel formula with Fox Valley Ultraboost. It dissolves instantly and stays fresh in the freezer. The squirrel went nuts for it. ;-)

  • 3

    Posted by Tonia Anderson on 14th May 2020

    I order squirrel picky blocks and nuts from you for my squirrel. She’s having some health issues and not wanting to eat so I tried this formula for her. Unfortunately she’s very picky and will not take the formula. I’m sure it’s a great formula but I’ve got a very picky girl!

  • 5
    Day one

    Posted by Suellen Duga on 11th May 2020

    I’ve used KMR primarily but decided to change to Fox Valley and so glad I did. My kittens have had no diarrhea from formula. Great weight gain from day one. I will continue to use this formula in conjunction with the Boost.

  • 5
    Ultra Boost

    Posted by A.L.W.A.Y.S. Companion Animal Rescue on 6th Oct 2019

    We use this with orphaned neonates to help ensure they have a robust caloric intake. Works beautifully.

  • 5
    Fox Valley UltraBoost

    Posted by Daisy / Jo Ann Peterson Walters on 19th Sep 2019

    Our baby squirrels weren't putting on any weight, but this seem to satisfy them longer and now they look healthy again.

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