When I got my first boy Hazelnut, I tried everything on the fresh food list on the forum, including bananas, to see what he would like. He refused to try any food except carrots, parsley, baby spinach leaves, cos lettuce, redoak lettuce, mizuna lettuce & chard lettuce. I'd waft it all in front of his nose or bring it up right to his mouth & he would always keep his incisors clamped tightly shut if he didn't want it. For an 11week old baby he was a right fusspot. In any case, not fond of fruit.
At 7 months I managed to get 4 week old Peanut Butter to be his friend. He was happy to try anything but the minute he saw Hazelnut was not eating it, he would stop. In the end he went on the same diet as Hazelnut. They are now almost 4 & 5 years old.
Last November I adopted two 2.5 year old boys. Decided it was just easier to keep everyone on the dame vegie diet & so far they are thriving on it.
The only ones that eat fruit in this house is me & poochie! She LOVES sliced banana & tomatoes. I do remove the tomato seeds though as she is a shi-tzu & I'm somewhat afraid of her choking on them. She also expects to get carrot batons when the piggy boys get them!