Don't drill glass. I think prior author didn't realize it was an all glass enclosure. For having done a years worth of research, you have a lot of uninformed questions and not well thought out basic management issues. So, I wouldn't be so harsh on your parents. You will need them as allies...
Re-read the resources pages several times. Different things will stick in your head each time. When you are nervous about your new baby, it's easy to get overwhelmed. So, keep reading the resources pages or use search tool and you should find most of what you need quickly. At least I did...
has he been getting dusted food with calcium w/o D3 every day, with D3 twice a month and multivitamin twice a month? If not, then vitamin deficiencies as others have stated are likely. Seems that general inflammatory process of disease could cause swelling. It does in mammals. Vet check.