My very first memory of the Sims 3: Pets = promptly freaking out because I thought somehow flies were swarming around my horses. Luckily, such was not the case.
Unlikely - those "flies" turned out to be a hideous box that pops out of your horses at inopportune times, ruining photos, hanging awkwardly in space and spazzing out newbie simmers. Another lovely artifact that EA could not be bothered to fix, it seemed that if we were to strive for realistic hoof colors, we would forever be plagued by the terrible hoof cube.
Read more and download at Equus-Sims