Pruning tall evergreen holly
I've got a number of hollies in the back garden of a house I moved to 12 months ago. One is going to come out as it is in terrible state, and one (a male) will be left alone entirely, but two of them are getting too tall for where they are.
They are each around 12ft - 15ft, and are female evergreens (lots of berries last year and this!), though I have no idea what variety. They are both fairly slender in their growth, cetainly not bushy.
What I'd like to do is reduce their height and encourage some bushing out.
If I cut off the mail truck/leader at about 10ft high (it'll have a diameter of a 1.5-2.0in) are they likely to:
b) sulk, but survive
c) keep calm and bush out
And is there a best time to do this?