Advice on how revive this holly bush pls

[scz4]

I have two holly bushes next to each other, different variants. But 2 years ago the one on the left dropped most of its leaves and never recovered, no fresh growth at all. Since then, I've fed it multiple times with bone meal and plant food, but nothing really works.

Should I take the risk and cut it right back to help stimulate fresh growth? Any advice on where to cut it back?

Thanks in advance.

|https://thumbsnap.com/urg4f9gw[/url]





The good one.

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Edited by scz4 on Monday 15th April 08:59

[scz4]

Anyone?