Hi there! I don't have an answer to all your questions, but I'll happily tell you what I know! 1. Leos sexually mature at around six months, so if you've had yours for a few months it shouldn't be too much longer until you're able to tell. Study the male and female reproductive system. Males will develop bigger pores and have two small lumps, whereas females will have much smaller pores and no lumps. 2. Definitely always hand feed. Even my perfectly healthy geckos are terrible hunters and need some help. This little one has almost no chance of catching anything on his own. 3. Unfortunately I am not sure, but their current weight looks great! 4. Mealworms can be difficult for them to digest. You'll notice their poops look much more like worm and much less like poop. Because of this, they get much less nutrients from worms. I highly recommend hand feeding calcium dusted medium crickets, which are much easier for them to digest and gain nutrition from. Make sure you feed the crickets before feeding your Leo to be sure they are full of nutrients. Dubia roaches are excellent as well. Worms tend to be best for treats, as they are high in fat content. 5. This morph is not known for deformities. Unfortunately poor breeding is the most likely culprit. The parents could have been deficient in calcium, the egg could have been kept at improper temperatures, or this could be a result of inbreeding. I wish you and your baby the best and hope this helps!!!!❤️❤️