How to differences between melanistic black & tan and bi-color during puppy
Im just new, yesterday i had went to breeder house and there have a new GSD puppies arrive, it about 1 weeks plus only,
1. do working line gsd with melanistic blank & tan?
2. may i noe any way to different between melanistic blank & tan and bi-color since they only born out about 1 week plus.
please give me some guide