A case of organophosphorus (OP) poisoning in two Rex rabbits is described. Three animals were diagnosed as having dermatitis characterised by pruritis and alopecia due to infestation withCheyletiella parasitivorax. Two of the animals were dipped in 2% malathion solution: one died within 15 hours post-dipping, the other was euthanased subsequent to the onset of convulsions. A procedure for the future dipping of rabbits is suggested, and a recommendation is made for a lower concentration of malathion to be used.