I have 2 of the one that Vicky posted. How I get them on our girls is to put one leg in one side and hold it in place, then put the second leg in. I don't have to much problem with Zoom Zoom as she's not much of a fighter and a real sweetheart. Speedy gets fiesty sometimes and fights me. The other day, my husband noticed she gave him a look that said she wanted to go outside. She wouldn't let me put the leash on her, even tho I tried 2 times. Finally, I said to her (as usual) "if you don't let me put the leash on, you can't go outside" I put her back into her viv for a few minutes, she cooperated that time.
It took a while for her to get the point but as these two are more wanderers than our previous beardies were, a leash is a necessity or we would have lost them a long time ago. My husband insists on putting tying a piece of red yarn on the clip end of the leash. It helps us to see them when they wander and we, for some reason, haven't noticed.