Relative Supersaturation (RSS) methodology predicts the crystallization potential of urine. RSS is used to develop diets that lower the concentration of ions contributing to struvite and calcium oxalate urolithiasis.

Formulated with a special blend of fibers to promote satiety and reduce the spontaneous consumption of food.

Specially formulated to assist in the management of lower urinary tract disease and to assist in healthy weight loss while reducing hunger between meals in the feline patient.

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Labrador Retriever adult sitting with its owner outdoors

Chicken by-product meal, pea fiber, tapioca, wheat gluten, corn gluten meal, powdered cellulose, rice hulls, natural flavors, brewers rice, chicken fat, dried chicory root, salt, potassium chloride, calcium sulfate, sodium bisulfate, sodium pyrophosphate, fish oil, powdered psyllium seed husk, monocalcium phosphate, DL-methionine, choline chloride, taurine, vitamins [DL-alpha tocopherol acetate (source of vitamin E), niacin supplement, biotin, riboflavin supplement, D-calcium pantothenate, pyridoxine hydrochloride (vitamin B6), vitamin A acetate, thiamine mononitrate (vitamin B1), vitamin B12 supplement, folic acid, vitamin D3 supplement], trace minerals [zinc proteinate, zinc oxide, manganese proteinate, ferrous sulfate, manganous oxide, copper sulfate, calcium iodate, sodium selenite, copper proteinate], glucosamine hydrochloride, L-carnitine, chondroitin sulfate, rosemary extract, preserved with mixed tocopherols and citric acid.

Calorie Content

This diet contains 2911 kilocalories of metabolizable energy (ME) per kilogram or 239 kilocalories ME per cup on an as fed basis (calculated).

Crude Protein (min)32.0%
Crude Fat (min)8.6%
Crude Fat (max)10.0%
Crude Fiber (max)15.0%
Moisture (max)8.0%
Calcium (max)1.65%
Phosphorus (max)1.4%
Magnesium (max)0.15%
Glucosamine* (min)370 mg/kg
Chondroitin sulfate* (min)4 mg/kg.

*Not recognized as an essential nutrient by the AAFCO Cat Food Nutrient Profiles.

Dry Feeding

Body Weight Weight Loss* Post Weight-loss Maintenance
4.4 lb (2 kg) 1/4 - 3/8 cup (23 - 29 g) 3/8 cup (31 g)
6.6 lb (3 kg) 3/8 - 1/2 cup (31 - 39 g) 1/2 cup (41 g)
8.8 lb (4 kg) 1/2 - 5/8 cup (38 - 47 g) 5/8 cup (50 g)
11.0 lb (5 kg) 1/2 - 5/8 cup (44 - 56 g) 3/4 cup (59 g)
13.2 lb (6 kg) 5/8 - 3/4 cup (50 - 63 g) 7/8 cup (67 g)
15.4 lb (7 kg) 5/8 - 7/8 cup (56 - 71 g) 7/8 cup (75 g)
17.6 lb (8 kg) 3/4 - 1 cup (62 - 78 g) 1 cup (82 g)
19.8 lb (9 kg) 7/8 - 1 cup (67 - 84 g) 1 1/8 cups (89 g)
22.0 lb (10 kg) 7/8 - 1 1/8 cups (72 - 91 g) 1 1/8 cups (96 g)

Mixed Feeding

Weight Can + Starting Weight Losss After 4 Weeks Maintenance After Weight Loss
4.4 lb (2 kg) 1/2 can + 1/8 cup (13 g) 1/8 cup (7 g) 1/8 cup (15 g)
5.5 lb (2.5 kg) 1/2 can + 1/4 cup (18 g) 1/8 cup (11 g) 1/4 cup (20 g)
6.6 lb (3 kg) 1/2 can + 1/4 cup (22 g) 1/8 cup (15 g) 1/4 cup (25 g)
7.7 lb (3.5 kg) 1/2 can + 3/8 cup (27 g) 1/4 cup (18 g) 3/8 cup (29 g)
8.8 lb (4 kg) 1 can + 1/4 cup (16 g) 1/8 cup (6 g) 1/4 cup (18 g)
9.9 lb (4.5 kg) 1 can + 1/4 cup (20 g) 1/8 cup (9 g) 1/4 cup (23 g)
11 lb (5 kg) 1 can + 1/4 cup (24 g) 1/8 cup (12 g) 3/8 cup (27 g)
12 lb (5.5 kg) 1 can + 3/8 cup (27 g) 1/4 cup (15 g) 3/8 cup (31 g)
13 lb (6 kg) 1 can + 3/8 cup (31 g) 1/4 cup (18 g) 1/2 cup (35 g)
14 lb (6.5 kg) 1 can + 1/2 cup (35 g) 1/4 cup (21 g) 1/2 cup (38 g)
15 lb (7 kg) 1 can + 1/2 cup (38 g) 1/4 cup (24 g) 1/2 cup (42 g)
17 lb (7.5 kg) 1 can + 1/2 cup (42 g) 3/8 cup (27 g) 5/8 cup (46 g)
18 lb (8 kg) 1 can + 5/8 cup (45 g) 3/8 cup (29 g) 5/8 cup (49 g)
19 lb (8.5 kg) 1 can + 5/8 cup (49 g) 3/8 cup (32 g) 5/8 cup (53 g)
20 lb (9 kg) 1 can + 5/8 cup (52 g) 1/2 cup (35 g) 3/4 cup (56 g)
21 lb (9.5 kg) 1 can + 3/4 cup (55 g) 1/2 cup (37 g) 3/4 cup (60 g)
22 lb (10 kg) 1 can + 3/4 cup (58 g) 1/2 cup (40 g) 3/4 cup (63 g)
Royal Canin Veterinary Diet Feline Urinary SO + Satiety Dry Cat Food

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Customer reviews

Sissy64
30 Oct 2019

[This review was collected as part of a promotion.] Good for keeping stones at bay. Cat still fat but I am probably giving her too Much. Please improve on the flavor of the Can food, my cat does not like it. She does Like the dry food.
30 Oct 2019

Fantastic line of food

[This review was collected as part of a promotion.] I have a Persian cat with sensitive stomach and portion amount issues. This food changed her from a Grumpy cat to a sweet cat! Thank you for changing her life for the better! My other 3 cats prefer it also over Purina One.
Lin2579
30 Oct 2019

Cats love it!

[This review was collected as part of a promotion.] I have one cat that required this food, but all my cats come running when I fill their bowls.
Kellyt
30 Oct 2019

Fantastic product

[This review was collected as part of a promotion.] My cat was having trouble with crystals in his urine. Our vet recommended we use this food to correct this problem. My cat Oreo has been using this food for probably 5 years now and there have been zero problems with crystals. He also likes the flavor.
Karla87
30 Oct 2019

Cats love it

[This review was collected as part of a promotion.] I have been buying this for about 3 years due to one of my cats getting frequent urinary infections and have no issues since then
Kellyt
27 Oct 2019

Great product

[This review was collected as part of a promotion.] My cat was experiencing crystals in his urine. My vet started him on this food right away. It's been over 5 years now and we have not had any other problems with crystals. Our cat likes the flavor and has a healthy shiny coat. It's a great food to keep your cat or dog healthy and happy.
Roop
26 Oct 2019

My cat loves it!

[This review was collected as part of a promotion.] My buddy had a blockage and we were told he needed to be on special food and he really took to this one
mosley
23 Oct 2019

cats love it

[This review was collected as part of a promotion.] my cats love it.. they are on the urinary diet, the vet gave me samples and i got them to eat to of them..they eat it , that's all that matters
Mindysr
23 Oct 2019

My cats love it!

[This review was collected as part of a promotion.] We had a terrible few months with kidney stones and almost lost our cat at just 5 years old. Now, he’s 10. He has been on this food ever since and we’ve never had another kidney stone problem!
GTohnine
22 Oct 2019

Happy kitty

[This review was collected as part of a promotion.] My vet switched my cat to this fromula because she is 12 lbs. She has lost a litle weight, but what is great is the small siize of the kibble. She is older and prefers the small size although her teeth are in good shape.