Any one that has a chainsaw thinks they are experts on tree pruning and care. Most haven’t got a clue. I always recommend contacting a Certified Arborist from the International Society of Arborculture to care for your trees. Ask for a certification card and prof of insurance. Get more than one estimate if you can and make sure that each bidder for the job knows you are getting more than on bid. Don’t ever hire someone that says your trees need topping. You can find a Certified Arborist by going to the following web site: International Society of Arborculture
Other web sites that are very helpful are:
Organic Tree Care (Dirt Doctor) excellent web site.
TLC For Trees another excellent site.