I think she just read it wrong. I thought you meant spayed too, haha. So you mean if it's not treated with chemicals. Yeah, you shouldn't ever let them nibble on it if it's been treated with anything anytime recently, no matter what age they are. As to the age that is best to wait til before letting a rabbit start veggies or fresh grass, it really just depends. There are young babies that have had grass and veggies since they were hopping out of the nest, and haven't ever had problems, but then with others it will cause them to get soft poop and poopy bums. It can really go that way for any rabbit at any age. Basically it depends on how sensitive a digestive system a rabbit has and how quickly a new food is introduced. No matter what age you introduce veggies/grass at, it's best to start with small amounts and increase it gradually, so that you are giving the rabbits digestive flora time to adapt to the new food. And starting slowly also gives you a chance to see if the new food causes any digestive problems for your rabbit. .Generally speaking, it's usually recommended to wait til they are at least 3 mo. old, to just give their digestive systems a little more time to develop. It's a good guideline for new rabbit owners to go by, as they are just starting out and aren't as familiar with the kind of digestive problems to keep an eye out for with their new rabbit. But really in the end, you need to decide for each rabbit when and what is best, on an individual basis.