There are a lot of articles and care sheets out there stating that beginners shouldn't take on a hatchling because they're more delicate than a young tortoise that has "weathered the storm", so to speak. But how long before a hatchling is out of the delicate stage? I've seen some recommend yearlings, but most breeders don't hold onto baby tortoises for a year. What about 5-6 months? Are they a lot less hardly than they are at 1 year, for example?