by maddog » Mon 04 Nov, 2013 9:50 pm
The dog and goat are normalised, but are frequently shot or baited if they cause problems. This argument would be convincing if it were proposed to import the fox to an area not yet colonised (such as Tasmania), then to market them as suitable pets. But that is not what is happening. The mainland fox population is already so widespread that the rescue, vaccination and desexing of a small number of foxes by the compasionate is unlikely to have any significant impact on fox or wildlife populations (or public taste for that matter). If you dislike foxes, dogs, or goats - don't adopt one.
As for Toxoplasmosis, the impact of the parasite on native wildlife is largely speculative. Attempts to link it with past extinctions are unconvincing. Cats are often blamed, but the lack of correlation between the parasite within native species and the distribution of cats is inconvenient. It has been maintained by generations of healthy animals without exposure to cat excrement (e.g. by wallabies and sheep), so the transmission of the parasite within wildlife populations cannot be discounted as the true cause of infection. We cannot even really be sure it first arrived with the cat.
Cheers