A mountable and ventilated doghouse (1) comprising a floor base (2) a front wall (3) provided with an opening (3c) for the dogs and air flow entry and exit and a rear wall (4) side walls (5) engaged between said front wall (3) and said rear wall (4) a roof (6) and a ventilation system configured for raising the roof (6) with respect to the front wall (3) and rear wall (4) and to at least one side wall (5), said roof (6) moving from a normal use position (A) to at least one ventilation position (B, C, D) enabling the entry and the exit of an air flow greater than the air flow flowing through the opening (3c). The ventilation system comprises: - at least two gripping elements (5e) provided on the outer face of each side wall (5) in correspondence of indents (5d) formed along the upper profile of each side wall (5) - interlocking closure latch elements (11) provided, two by two, under the lateral lower profiles of the roof (6) and - at least one hooking / unhooking handle (12), provided in each side wall (5), formed by a rectangular element having an area able to overlap the indents (5d) and comprising, on the upper edge of its inner surface, cylindrical gripping pins (12a) able to be engaged with the interlocking closure latch elements (11), and, on the inner surface immediately below the cylindrical gripping pins (12a), two upper interlocking latches (12b) and two lower interlocking latches (12c), to which the gripping elements (5e) are alternately two by two engangeable.Linvention concerne une niche (1) montable et ventilée comprenant une base plancher (2) une paroi avant (3) pourvue dune ouverture (3c) pour lentrée et la sortie du chien et du flux dair, et dune paroi arrière (4) des parois latérales (5) en prise entre ladite paroi avant (3) et ladite paroi arrière (4) un toit (6) et un système de ventilation conçu pour soulever le toit (6) par rapport à la paroi avant (3) et à la paroi arrière (4) et à au moins une paroi latérale (5), ledit toit (6) se déplaçant du
