Troy Calcium Syrup is a dietary calcium supplement for dogs and cats, used as an aid in the prevention and treatment of calcium deficiency and disorders of calcium metabolism. It's a long-established veterinary supplement designed to be added to food or given by syringe.

The active ingredient is calcium at 22mg/mL, supplied as calcium glubionate and calcium lactobionate — forms with good bioavailability for oral supplementation. It's most commonly used to support bone remineralisation in pets recovering from calcium deficiency, in pregnant or lactating bitches and queens, and in growing animals where dietary calcium is insufficient. Dosage should be guided by a veterinarian, and it should not be used alongside diets already heavily supplemented with calcium. Available in 250mL and 1L bottles, plus a 350g powder option.

Troy is one of the older Australian veterinary product brands and the Calcium Syrup is the supplement most vets default to when dietary calcium support is needed. Owners typically use it on vet recommendation rather than as a routine supplement — it's a targeted product for a specific need.