I bought this safety fence and gate to define no go zones while introducing new foster dogs. It is stable where I want to use it.  I like the stay open mode of the gate and the fact that I can fold sections flat against one another to better fit a choke point (see left side of photo). A big dog could of course jump over.  If youre willing to use the included wall mount hardware,  you could make it very difficult to push the whole fence over.  The fence is heavy enough to be pretty stable in zigzag formation if you want to use it free standing.