However, in a comment published in the same journal other scientists argued that a number of factors (primarily a reduction in the use of the Myxoma virus) were almost certainly involved and the absence of cats may have been relatively minor among them.
Međutim, u komentaru objavljenom u istom znanstvenom časopisu tvrdio da je niz drugih čimbenika (ponajprije smanjenje korištenju miksom virusa) gotovo sigurno imao veze a odsustvo mačaka je moglo biti minimalnog utjecaja.