No, unless the problems are totally unrelated. For example, if your dog cut his leg before your policy start date and this healed, and then your dog was unfortunate enough to cut his leg again, this would be classed as a new injury and would be covered under the terms of the policy (subject to the limits, excesses and exclusions that apply). However if the original cut did not heal properly and your pet needed further treatment, this would not be covered. Symptoms exhibited before the policy start date that are subsequently diagnosed are not covered either.