Modelling work progress

So finally i modelled the basic shape of my bull but how does the modelling work progress go on?
I’d like to make it more detailed.

Any Tips or Tricks?
http://img186.imageshack.us/img186/9939/66292371uo8.jpg

Good base model. Horns and maybe the ears and back legs look like they need reworking. After that,add a normal map to introduce all the muscle tone.

yeah u just need to work on the ears an horns

ok I’ll try to correct it I never did normal maps before thanks ^^