> therapeutic regimen starting at 6 weeks of age when the disease is fully established and lasting for 6 weeks up to the 12th week of age of the animals. (biomedcode.com)
The young age of the animals tested would indicate that they probably were infected quite recently, i.e. during the course of the last year. (sciencedaily.com)
Pets age differently than humans, so it can be difficult to determine the exact age of your animal. (lyndenvet.com)