Which lettuce is good for guinea pigs

Celery: All of the celery is good. I used to buy celery with no leaves. Now I buy the most leafy bunch I can.

Peppers: These are very full of vitamin C and very good for Guinea Pigs. I have read online that 1/7th of a green bell pepper is enough vitamin C for a piggy a day. I tend to buy lots of different coloured ones and give a different kind each day. I cut up half of one to share out between them. Clean out all of the seeds when you give them to your Guinea Pig. I have read time and time again that no kind of seeds should be fed to Guinea Pigs. I am not sure if its because they can be toxic or fattening. However seeds is something I avoid giving them.

Parsley: This is a great source of vitamin C and they love it. Also you can grow it very easily in your garden. Supermarkets sell this fresh and its very cheap.

Baby Sweet Corn: My Guinea Pig's love baby sweet corn when it is still fresh and crunchy. Be warned if they are sat on you when they eat this it makes a real mess!

Fresh corn on the cob: When you can buy these fresh in season (Not the frozen type) I buy one and put it in the cage. The pigs are not over keen on this but do like to drag it in to a hidey hole and sit and munch on it.

Apple: My piggie's only like certain kinds of apple. I buy old fashioned english apples, the yellowish with red splashes on. I do not feed them this often as I have read that apples can cause blistering around the Guinea Pig's mouth from the acid in them. I have never experienced this but have noted this and only feed apple about twice a week.