Poorly raspberries

[Merrilydancing]

My raspberries are looking really poorly this year.

They are looking quite spindly, with few leaves and those which have flowers are looking quite frail.

They did get a come chicken manure in March so put some feed back into the ground so really not sure what has happened this year as usually by now they are all big and bushy.

Any advice on what has gone wrong?

I planted (summer fruiting) raspberries about 6 years ago and they progressively became more spindly. Maybe that’s about their life span …? I planted new ones this year.

Thanks, just so strange as they have always been so healthy. Oh well, next year, I will get some new ones!