I know if i went through the trouble to create a caresheet i would be quite annoyed to see someone else posting it without permission to use it. I wouldn't want to have to go through the trouble of emailing the individual who put the site up to ask him or her to take it down. It's a common curtosy to ask someone to use their work, before using it. Considering most caresheets on the net are published one way or another in a reptile book of some kind.
Also, just out of curiousity, you are using other peoples caresheets. These methods worked for them but whos to say they arent outdated? You cannot possibly say you have kept every species you are going to add to your site. I feel you should either stick to the individual species you keep and know about, or email the people who made the caresheets and ask them to use them and make sure they are up to date.
Iam pretty against the whole idea of posting caresheets on species that you have never worked with on a personal level. This is why most people have others submit caresheets of their own observations with the animal in question.