they slip threw the cage
yes you can take a frog out of its cage
no
frog can breath through these with it's mouth closed, can be opened or closed with sphincter muscles
The Frog hopped out of the cage.
frog does not have ribs. It does not have rib cage also, so frogs cannot breathe by expanding the rib cage
racoons
maybe your turtle is following the frog keep the frog in a separate cage if it is not following the frog its probably very safe
because a frog is not a mammal.
I wouldn't put them together. They might attack eachother.
If it is a frog that is a natural inhabitant of the area, you need to let it be free.
It is called closed because all the plasma and its contents are contained within the vessels.
If they are smart they can. Especially if there is an opening and something for them to climb on. But the best bet is to keep a closed cage, in case they are smart enough to escape.