standing in corners

Question
My 15-year old peke-a-poo has cataracts (I've been giving her caratact care drops for these), possibly lyme disease (she's getting antibiotics), kidney failure (she's getting sub-q fluids and multiple supplements to support the kidneys) and a formulated Chinese diet and herbs (she was sleeping on cold floors her internal temperature was so high and the diet and herbs have turned this around).

When outside she walks around, her tail up and wagging.  But when inside she walks around finds a corner where she can hide her head and stands for long periods of time.

Is there ANYTHING that can help her enjoy life better?

Answer
Your dog appears to be suffering a severe loss of security in her environment, even though you appear to be very proactive in her medical treatment and are giving her superb care.  I suggest you post this question to Shelly Davis, who is on this forum and who knows a great deal about nutritional support.  Also, bring this behavior to the attention of your veterinarian immediately.