Hello,
Keep in mind that 9 weeks is VERY young for her to be separated from her mother. It is generally recommended that a puppy never leave the mother until she/he is at least 12 weeks of age.
At 9 weeks the puppy would have a VERY difficult time learning and knowing her name. It often takes up to a month for a puppy to fully recognize and come when their name is XXXXXX XX this is pretty normal for her age.
As for the treats, young puppies often are not as excited for treats as older dogs as they have only been eating mothers milk and their food for a few weeks so treats is not something they fully understand. Most puppies love treats, but prefer those made from milk such as cubes of cheese.
At this point I think what you are seeing is more her age then anything else. Mental illness is not often seen in dogs other then anxiety and stress. While there could be some cases it is very rare as dogs brains do not react the same way a humans does.
Walter
Breeder
Breeder and pet health consultant. Have spent a number of years with dog rescue, training and health