New to Leopard Frog - Need Advice, Please

[John]

Do frogs need to be "dewormed" periodically like dogs?

Wild amphibians often have gut parasites, sometimes lung worms and other nasties. Dealing with them usually requires a trip to the vet. Provided you feed the frog from then on with foods that don't carry parasites or have been treated (e.g. frozen) to kill any possible parasites, then you should not have to dose the frog again. Many people who just keep one kind of frog will forgo treating it for parasites.

Do they need vitamins or some such thing?

Young frogs can usually benefit from a calcium dusting every once in a while, but if it's an adult, a varied diet should be sufficient. The vitamin/mineral and calcium supplements sold for reptiles are suitable for amphibians.