Yes, it is. It also states on the bottle that it's veterinarian
approved, although, that really doesn't mean a whole lot.

I provide several water bowls throughout the house for the cats. Some
have just plain water and others have the dental product. My oldest cat
has heart and urinary problems so I don't put it in the only bowl he
drinks out of.

When I last took in one of my cat's the veterinarian suggested that I
try one of the products that goes in the cat's water. The cat's teeth
need a professional cleaning but the cat is in no condition to have
dental surgery at this time. So for now, we are trying at home care.

I'd like to start brushing the cat's teeth or using a dental rinse such
as Nolvadent. The problem is that this I found this cat when she was 2
months old and she was already severely infected with feline herpes and
calici virus. It's caused severe gingivitis, extremely stinky breath,
painful teeth and gums, two adult canines have not yet grown in (she's
2 now). She also has chronic eye discharge and occasional sneezing. In
the winter she gets little nose bleeds, nasal congestion, and sometimes
has difficulty breathing through her nose.

She's an indoor only cat and I try to limit her contact with anything
that could cause flare ups. I don't open the windows on high pollen or
mold days, I keep the A/C on in the summer, in the winter I use a warm
mist humidifier and vaporizer. I've tried various supplements such as
Lysine, a small amount of Vitamin C, Echinacea, and Missing Link. These
supplements will work wonders for awhile but then they seem to lose
their affects. She's also on a premium cat food and a strict diet as
she was getting pudgy. She eats dry food for now as the canned/wet food
seems to cause oily anal secretions. I've read somewhere that in cases
like this, sometimes dental care is the key. I certainly think that her
dental problems are causing a lot of the problems.

Unfortunately, I live in a small area where the veterinarians just
aren't up-to-date on this sort of stuff. There's no where else around
here to take the cats. In fact, if I had taken this cat to the animal
shelter like my parents wanted, they would've euthanized the cat. The
local (county) animal shelter has no problems immediately euthanizing
cats with feline herpes and such things. It's such a shame too, the
poor things don't even get a chance. I'm glad I kept this cat. She's
such a sweetheart. She's the sickliest cat I have and yet she's the
most energetic and most happiest, so full of life.