Last summer my girls went through at least 80lbs. of tomatoes, they "tear them up." The one problem that you have to be careful of is that the protein % in their diet might be lowered enough to suppress egg production. Whenever I give them an excess amount of fruit or veggies I supplement with some 31% protein dry cat food.
Please don't tell me that the cat food is bad for them, I know what the "treat chart " says about it. This is what I do and have not had any problems, this is not a recomendation for any one else to do so.