just a suggestion
you could use a simple 2-way ANOVA
with three possible hypothesis
1. There is no difference in the means of factor A
2. There is no difference in means of factor B
3. There is no interaction between factors A and B
from what I have read you have two treatments, the control one and the real treatment. then you have a pre-test post test wherein you collect data 30 days after the treatment and then 60 days after the treatment.......hmmmmmm.......one thing I would ask is what if you collect only 60 days after the treatment or maybe 30 days after the treatment?
maybe you could choose one of them.....or maybe you would like to know the extent of the treatment if it is prolonged or with accordance with time.....
well I'm kind of new here so be easy on me ^^ anyway I hope it helped even just a little ^^