A portable pet potty and a wetting wall for male dogs or the like. The potty includes an elongate trough for receiving animal waste and a pair of pet constraining blocks to the left and right of the trough. A set of latching bars connect the trough to the blocks and, together, the trough, blocks and bars define barricaded areas on the left and right sides of the trough which the pet will avoid. Consequently, the pet will straddle both the trough and the barricaded areas so that its body will be precisely aligned over the trough, preventing accidents. The position of the blocks relative to the trough is adjustable for accommodating differently sized pets. The wetting wall is formed of several panel pieces including a left corner piece and a right corner piece each of which provides a floor, a back wall and a left wall in the left corner piece and a right wall in the right corner piece. The floors slope toward their centers where a central hole directs waste fluid into a removable drawer below the hole. The left corner piece has a set of pegs while the right cornerpiece has corresponding peg receiving holes. Together, the pegs and holes permit the corner pieces to be tightly connected to provide a contiguous back wall which forms a wetting wall for a dog. If desired, one or more intermediate add-on pieces are interposed between the corner pieces to enlarge the size of the wetting wall.