I bought a supplement called Senioraid from VetUk. This is what it says it's got in it:

Taurine
L-Carnitine
Methionine
Arginine
Glucosamine HCL
Ascorbic Acid
Thiamine HCL
Riboflavine
Niacin
Vitamin B12
Vitamin B6
Biotin
Folic Acid
D-Calcium Pantothenate
Iron (Amino Acid Chelate)
Iodine
Potassium
Zinc Oxide
Copper (Gluconate)
Maganese Sulphate
Selenium
Choline
Vitamin A Palmitate
Vitamin D3
Vitamin E

It lists the amounts of each per 10ml. Is this a good supplement to give my two dogs aged 12 and 10? I just want to give them something that's good for them.