Roxey was having problems with her back leg and the vet recommended this...Synovi G3 It worked like a charm so needless to say I suggest it. Much cheaper through Amazon than it was from the vets (1/2 the price actually!). Take a look at the reviews, seems a lot of people have had success with this.

Ingredients
Glucosamine HCI, MSM, Creatin Monohydrate, Perna Canaliculus, Microcrystalline Celluslose, Sucrose, Natural Meat Flavor, Natural Liver Flavor, Marine Lipid Concentrates, Citrus Bioflavonoids, Calcium Phosphate, Vitamin E, Lecithin, Manganese Sulfate, Vitamin C, Ainc Sulfate, Magnesium Stearate, Colloidal Silcon Dioxide, Alpha Lipoic Acid, Grape Seed Extract, Selenium.

Another thing I suggest is Liquid Health. I gave this formula to Angus and it worked wonders for him.

Nutritional Information
Glucosamine Sulfate*: 5200 mg

Bromelain*: 1000 mg

Perna Mussel*: 2000 mg

Cat's Claw*: 400 mg

Ester-CŪ: 2000 mg

Parsley*: 235 mg

MSM*: 1750 mg

Grape Seed Extract*: 75 mg

Shark Cartilage*: 1000 mg

Manganese: 10 mg
Ingredients
Purified Water, Glucosamine Sulfate, Apple Cider Vinegar, Perna Mussel, Ester-CŪ, Methylsulfonylmethane (MSM), Shark Cartilage, Bromelain, Cat's Claw Powder, Parsley, Citric Acid, Grape Seed Extract, Potassium Benzoate, Potassium Sorbate.


I hope you can find something that works for you guys.
Just thought I'd add my two cents