arborvitae topping and stress

Question

Should I top two arbs from
10 ft to 7? Will it harm
them, and will they continue to grow up and out without a problem as healthy trees? No recent food was given in 5
years.

Answer 1

Topping arborvitae is not recommended. These articles explain why, and what you can do instead:
http://www.pennlive.com/gardening/2015/07/topping_a_line_of_too-tall_eve.html
https://ask.extension.org/questions/164462