Had six cats (one "t"). Now, sadly, down to four. One used to go after
any orchid on any windowsill. Got a piece of clear plexiglass and cut it
to the width of the window frame and about 3/4 of the height plus an
inch or so for the pot. Very carefully drilled a hole in the upper two
corners. Screwed two "L" hooks into the window frame and hung the
plexiglass from the hooks. Put one hook at a bottom corner that could be
turned to lock the sheet down. The cat couldn't get at the plants and
the plexiglass doesn't look all that bad - mostly clear. It was possible
to, very carefully again, slip the sheet to the corners of the hooks and
raise slightly for watering, removing or anything else that needed to be
done. Never got another plant after that.