Thanks cypher! its hard when they are so close to it, and the colour in this picture isn't the best because we all know how dirty that window is. My aperture was at 8.0 i believe.
Nassir was laying beside mom when he did a few rolls to his left, soon poped up a little head (Nneka), i have another funny one that Nneka looks to be biting Nassir and Nassir is pretending to be hurt, at least thats how i look at it.
When shooting through a window or fencing, try using a larger aperture (which is a smaller number). That will help blur the fence, and distortions with the glass. It may not work all the time, but it'll definitely help.