I just moved into a new house (in Washington state in the US Pacific North West) and we have this large shrub in the front yard:
The old growth seems to have green leaves whereas the new growth is more pink-ish. It is probably about 7-8 feet tall and I assume it hasn't been pruned in a very, very long time. It has very thin, very sharp thorns.
Any help in identifying what this is, and how/when should I prune them?