Please dont ever be afraid to ask questions, the only silly question is the one that is never asked. By asking questions, and reading you learn, and will educate yourself, and then in turn educate someone else down the road.
As far as his diet does he eat anymore veggies then carrots? A rabbit should have a varied diet of greens and things like that. Carrots should be given and treated as a snack, as that it should only be given in small amounts and occasionally. There are threads that have lists of the foods to feed and not to feed, i am sorry i cant get the links in here i am having computer trouble and dont have time to reboot :banghead:crash. As far as the yougurt treats there is much debate as to whether they are ok or not, I personally only give on very rare occasions, I still have a bag of yogurt treats from a while ago,lol. Someone else will hopefully chime in with the good and bads of them , and as far as life span I will leave that with someone who knows better about your breed. :bunny24