The present invention is a new class of terpolymers for use as high strain electrostrictive polymer films. In particular, the present invention provides animal models with naturally occurring epigenetic variation for the evaluation of treatments through effects on the epigenetically determined and imprinted characteristics of coat color, coat color pattern, DNA methylation, long terminal repeat expression and LTR activity of offspring. The vacuum chuck extends along a perimeter circumscribing the singulated devices, and at least one groove is defined in the upper surface of the vacuum chuck. The swab-able access port permits disinfectant treatment before receipt of the blunt cannula to limit and prevent contamination of sterile fluids. The second transient voltage is generated in each first switching element when the state of the first plurality of switching element is switched.