Essex,
United Kingdom 
I have big chunks being taken out of my San Marzano tomatoes growing in the greenhouse. Any ideas? My husband swears it is not him. They are delicious, but I am not prepared to share them with any creatures. Do mice eat tomatoes? They are only choosing the ripe red ones growing near the bottom of the pot.
9 Aug, 2010
Answers
They are pretty big chunks, but that is a good suggestion I hadn't considered. I will put a slug trap in there to see what I get. Thanks
10 Aug, 2010
I would be looking for fruitworm, but I don't know if that's a problem across the pond.
10 Aug, 2010
I don't think we have those in the UK!
10 Aug, 2010
Count your blessings! Slugs are likely, birds are possible, especially if the missing chunks are triangular, and I have seen grasshoppers chewing on green tomatoes, too.
10 Aug, 2010
One possability could be slugs but am sure the more knowledgable members will be able to give more possabilities.
9 Aug, 2010