Harkers Loft Treatment. Harkers Loft Treatment is a dry disinfectant in powder form especially designed for use in pigeon lofts. This Treatment is a dry disinfectant which inhibits the spread of disease-causing organisms which are often spread via the droppings.Even though the disinfectant is dry there is not lime or chalk based which can dry the natural oils on a pigeon#s plumage.The dry disinfectant is compatible with all systems and should be sprinkled lightly around nesting and perching areas # paying particular attention to any damp patches which are normally the danger areas in pigeon lofts.Loft treatment is pleasant smelling, finely divided powder which incorporates a powerful ammonium biocidal agent.When spread as a dressing, bacteria is held in Loft Treatment#s highly absorbent matrix and efficiently neutralised.Bacterial # effective against bacteria and oocystsPleasant to use # keeps lofts smelling freshDry disinfectant # can be used when weather is dampCompatible with all other hygiene systems # pe