Welcome. We have a few owners on the board with dogs similar to yours. I am one of them. So big hugs for loving your pei!
You have a special dog. Breed has something to do with some
of the behavior
and then you have a dog that probably did not get the vital early 7 weeks of human contact needed.
I always recommend the following book to owners of dogs that may not have been given that important window
of development. Do not let the label 'feral' worry you.
I have worked with many dogs (two are in my home now) that 'missed out'....http://www.voice4dogs.com/feral-dog.html
and this link also has great tips for training dogs with various issues:http://www.bestfriends.org/theanimals/p ... ogLife.pdf
On the topic of nail trimming a shar pei. Oh boy! I have trained many breeds and I must admit
shar pei are my greatest challenge when it comes to nail trimming a ear cleaning. Feisty buggers.
(Well I had a hybrid wolf who was pretty scary too but when his were too long and impeded his movement
he would eventually submit to getting a trim)
I resorted to trusting a vet tech who works a my vet's office who is very experienced in dealing
with the 'fits' of a shar pei.
I pay a bit of fee for Noodle. She costs me $11. The other two have adapted to a dremel. it takes practice
and alot of trust.
Post pictures of your shar pei!! You can paste links from photobucket, if that is easier than shrinking the pics!