I am glad that your albino is alright, "Lucky" most liekly climbed up the side stones in photo 3, and jumped the rest of the gap over the glass.
You should not feed large chuncks of meat like that, further more, I'm not sure you should be feeding it chicken. What do you normally feed it? It's staple food should be an insect like crickets or nightcrawlers, not poultry.