Supplements for Puppies

Maximum Health for Adult Cats

Dr. Bill’s Supplement Recommendations

Dr. Bill examining dog

“Adult cats come in all sizes, shapes and hair coats and their activity levels range from sleeping all day to highly playful and getting into everything. The many different cat breeds have a weight range from 2 – 25 pounds. These variables often require the use of multiple products to assure optimum health.  All my feline Animal Health Supplements are delicious, easy-to-use powders that can be mixed with any feline diet. During my more than forty years of experience as a veterinarian, I have found that powders are the easiest way to successfully introduce supplements to even the most finicky cats.”

— Dr. Bill Barnett


Feline Ultimate Fitness & Health

Feline Ultimate Fitness & Health is a great Animal Health Supplement to ensure your cat is receiving everything they need to help remain healthy throughout the trials and tribulations of adult life. It contains 78 essential and specialty nutrients that improve health, function as an easy weight control system, and provide nutritional protection throughout adulthood that prepares them for the best health possible going into their senior years.

Dr. Bill examining dog
Additional products to consider adding are my Feline Immune Support and Feline Health Defense, especially for cats who have the opportunity to get out and explore or socialize nose to nose with other cats.

Feline Immune Support

The 41 active ingredients in Immune Support are designed to help your cat’s innate immune system fight off disease causing organisms before any serious problems can take hold. Like all our feline Animal Health Supplements it is a delicious, easy-to-use powder that can be mixed into any of today’s cat foods. 

Feline Health Defense

All cats experience illness and minor injuries. So, Feline Health Defense is another good addition to your cat’s diet. The 42 active ingredients can supply millions of additional antioxidants to neutralize the increase in free radicals that always come with stress, injury and diseas, that can cause irreparable damage if left unchecked.

Choose my Adult Cat Maximum Health Bundle or ANY 3 products and SAVE 5%!

Adult Cat Maximum Health Bundle

$84.36 $88.80

  • Feline Ultimate Fitness & Health
  • Feline Immune Support
  • Feline Health Defense
Add to Cart


$84.36Save 5%

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More Adult Cat Supplements We Recommend

Feline Digestive Support

Adult cats will chew on all kinds of things. Poisonous plants, all kinds of bugs, and almost any small item they find around the house. The result can be stomach and intestinal problems like vomiting and diarrhea. So, another very useful product to keep on hand is my Feline Digestive Support. It can sooth those stomach problems and the pre and probiotic cultures can repopulate the unbalanced micro-flora stabilizing the intestinal tract once again. It also contains a proprietary blend of feline enzymes that will help dissolve those nasty hairballs!

Feline Optimum Skin & Coat

A cat’s fur is a good indicator of its overall health. Changes in coat color or quality can be the first sign of disease. Help maintain that natural shine or recover that perfect coat with a tried and proven product that provides all essential skin and coat nutrients in an easy to digest and utilize form. Veterinarians and breeders know that Feline Optimum Skin & Coat really works – that’s why they have been recommending it and using it for over 35 years.

Other Feline Categories



Adult Cat

Adult Cats

Senior Dog

Senior Cats

Her health has taken a 180 degree turn

“I’ve been giving Lily Dr. Bill’s Digestive Support for about 4 months now and it has helped her SOOOOO much! We had been battling her digestive issues off and on for a few years now (vomiting, diarrhea, and skin reactions to food) resulting in some pretty significant vet bills. What we learned was that she was not processing her food properly. Through adjusting her diet and supplementing with Dr. Bill’s probiotics and enzymes, her health has taken a 180 degree turn. She’s feeling so good! She’s so much healthier and happier, and honestly even nicer. I think having digestive issues was just making her cranky a lot of the time. And she loves the taste of Dr. Bill’s powder, so that makes it super easy to give to her regularly. We love Dr. Bill’s!”

-Andrea M., Pet Parent & Satisfied Dr. Bill’s Customer

Made all the difference!

“I was dog sitting my son’s mixed-breed rescue while he was out of town. It was pretty evident when he got him that he had been abused, but he was doing much better over time. Pare hadn’t been to my condo before and he was so scared it hurt my heart. Cowering and afraid if I left the room. My sister-in-law uses Behavior Support on her rescue with great success, so she gave me some to try. Made all the difference! He didn’t act drugged; was just way less anxious and no more cowering.”

-Anita R., Pet Parent & Satisfied Dr. Bill’s Customer

We've noticed HUGE improvements in her joints, health, and happiness

“We have a 9 year old chocolate lab and she had a major hip injury and surgery a few years back and her joints have never been the same. We have started giving her Dr. Bill’s Canine Complete Joint Care and have noticed HUGE improvements in her joints, health and happiness. She hasn’t been able to jump on our bed to snuggle for years and since taking this we have woken up with her snuggling up right next to us in the mornings!”

-Kelsey J., Pet Parent & Satisfied Dr. Bill’s Customer

Truly a miracle product!

“I’m actually astonished at how effective this product has been! It has made an ENORMOUS difference for our dog, Indie. We started administering the supplement to Indie, and then left on a trip to London for a week. Our dog sitters fed Indie the supplement each day, according to the instructions on the label. When we returned from our trip, Indie’s coat was glistening! It’s so much more lustrous and smooth, with less shedding. What’s more — Indie LOVES the taste of this stuff! I can’t believe the improvement we’ve seen in only a week! Truly a miracle product! So glad we found this hidden gem, and I’m excited to see how Indie’s coat looks in a month from now! Thank you, Dr. BIll! We’ll be using your products for life! (P.S. Another bonus is that the serving scoop is actually quite small, so this product will last you a long time!)”

-Zack W., Pet Parent & Satisfied Dr. Bill’s Customer

I was shocked at how thick and smooth her coat had become!

“My dog, Lola, has suffered from itchy, dry skin her whole life. Her coat always felt a little dry and wiry. I started her on Dr. Bill’s Skin & Coat formula with few expectations, hoping it may at least help her itch just a little less. Then I went out of town for a week and when I returned, I was shocked at how thick and smooth her coat had become. I didn’t think it was possible. Not to mention, the powder smells so good, I feel like I am serving her a gourmet meal each time I sprinkle it over her dry food. Lola is a happy girl!”

-Michelle S., Pet Parent & Satisfied Dr. Bill’s Customer