As far as flying, I think it should depend on the size of the puppy, but now I got my first yorkie at 6 weeks, never had a bit of trouble out of her..I have gotten dogs at all different ages, I prefer to get them around 6-7 weeks..If you are flying a german shepherd or golden retriever, bigger dog, 6-7 weeks would be good, yorkie I would say around 10 weeks to fly..imo |