A doppelbock has been sitting in the secondary on a yeast cake for 35 days. Is it even usable anymore? I was thinking of bottling then brewing a new batch and putting it right on top of the cake. Good idea or not?
If you make a starter with hops and it has good results during propigation I would taste it and that will tell you how good it is. I have made starters from 6 month old yeast and it worked great but you do need to propigate it again before use.