Not sure about the snake being injured but my BP, retic and big boa have all managed to push a door open. I watched them and figured it out. They stick their between the glass and the litter dam at angle almost lined up with the litter dam. Then they pull back which slides the door a little. Then they stick their head on the side of the cage between the glass and side and pull back and kind of use their head like a crowbar lol.

Dottie the BP actually got out once and i found her the next morning under a table.

Rosey slide the door open about 6 inches but didnt come out which was amazing.

And Caesar had just started his door opening when i caught him.

Luckily i have locks installed on all my cages which now i use lol.

AP can probably make you new doors and a front piece with a lock installed. You can talk to Ali. Her husband is Mark i believe but he doesnt talk on the phone. No idea who Bob is. Only Bob I know is the one at Pro Products.

What i would do is just go to Home depot or Lowes and buy a lock or even cheaper is just bend a piece of metal coat hanger into a backwards 'S' where the glass doors would sit in the bends of the 'S' and couldnt be moved.