We crated hair for a character. The hair is groomed on a neutral pose and then deformed by an animation cache. The problem is, the character's scaling might be adjusted shot to shot by as much as 50%. When we read a cache where the character is scaled up, the hair length stays the same length as the grooming neutral pose and so looks too short and too thin for the shots where the character is scaled up. Right now, it seems like we have to play with the length, the thickness, the interpolation Influence, etc… it becomes a nightmare. Is there an easier way to scale everything up to stay relative to the animated scaling?

or you make a global scale slider to control all the parameters of the character hair, OR??? scale the entire scene and leave the character alone. by the way, you should check Fabio hair system for houdini

sorry to hear that, we reported this bug while back in H16.0
Now year later, no fix.

You will have to do it manually.

Unfortunately there is no way how to scale asset with fur in Houdini.