“…The nature of periodontal disease progression has been widely studied in horses, donkeys, cattle, dogs and cats, with artificial studies leading to further understanding the intricate workings of mobility, recession and bone resorption (Ericsson and Lindhe, 1982, Hamp et al, 1984, Lindhe et al, 1975, Lindhe and Svanberg, 1974, Sorensen et al, 1980, Clarke and Cameron, 1998, Dobereiner et al, 2000, du Toit and Dixon, 2011, Mallonee et al, 1988, Reichart et al, 1984, Dixon et al, 2000b.…”