Pet Fence

FIG. 1 is a front, top, right perspective view of a pet fence, showing my new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a left side elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 is a top plan view thereof; FIG. 7 is a bottom plan view thereof; FIG. 8 is a rear, bottom and left-side perspective view thereof; FIG. 9 is an enlarged view of a portion of the pet fence shown in area 9 in FIG. 1 ; and, FIG. 10 is an enlarged view of a portion of the pet fence shown in area 10 in FIG. 8 . The broken lines in the drawings depict portions of the pet fence that form no part of the claimed design. The dot-dash broken lines encircling portions of the pet fence in FIGS. 1 and 8 and illustrated in enlarged views in FIGS. 9 and 10 form no part of the claimed design.