What is eating my Rhubarb?

Divided a root from a relation's garden last year, dug it a nice pit with lots of goodies in it, took off like a rocket until.......

Something is eating my leaves! Looks like the work of caterpillars but I can't find any traces of them (or of anything else for that matter). I thought that rhubarb leaves are poisonous (at least to humans) so can't be too appetising.

Any ideas? (see photo - a bit big so the eagle-eyed among us might be able to spot the culprits)

 

I must admit, my rhubarb always tends to be like it but as it still produces a big harvest I have never really looked into it.

It will be interesting to see if anyone knows what is causing it though!

 

I would say slugs or snails. They would feed at night, so unless you go hunting them then, you are unlikely to see them.:thumb::D

 

Dai
I have a big slug problem in this area (a big problem, not a big slug) and there may be a trace of slug/snail slime around beneath some of the rhubarb leaves so you may well be right. I'll put some blue pellets down and see if anything dies in agony.

 

Yep - slugs and/or snails

 

Full marks to all those who suggested slugs. A handful of slug pellets last night, and this morning I have at least 6 fat (dead) slugs and buckets of slime.