Look out for the excess value within your pet insurance agreement. This excess payment may prevent you for claiming on smaller vets bills. Some companies keep their premiums down by having higher excess charges as part of the policy. Do your sums first to calculate the real value of the cover.
There is a risk factor applied to all insurance polices and pet insurance is no exception. It is possible that older pets or animals with a history of being unwell may be difficult or even impossible to insure. Your pet insurance policy may set different conditions to the competition, so compare before you buy.
If you own more than one pet you can often purchase a multi pet policy rather than separate ones for each animal. Not all providers offer this but it is worth checking out to see if the current pet insurance provider will do a multi animal policy.