\usepackage {pstcol,pst-node,pst-coil}
\begin{pspicture}(-.2,-.5)(3.5,5)\showgrid
\rput(.5,.5){\rnode{A}{\psframebox{Cat}}}
\rput(3,4.5){\rnode{B}{\psframebox{Dog}}}
\psset{coilarm=.01,coilwidth=.3}
\nczigzag{A}{B}
\end{pspicture}