Preview video Mocho and Kruski

This is just the first preview of my project: Mocho and Kruski. The problem is that Kruski doesn't have the fur, because I cannot render it in this referenced file. Also the fur for the grass in the scene doesn't want to render. I have to turn them off, because if I try to render any fur it's going to take ages and then I run out of memory. What a pity! I went so far and now I'm stuck. Just waiting for some help. Or I have to get rid of the referenced files and do the animation again :-(