So, I have been lucky enough to have yet another true shoulder rat. She scampers off outside and always comes back after a few hours. She responds to nearly all commands while we are outside but when inside, she barely responds to any. She isnt even afraid of loud music. The issue is that she is a hairless and Im afraid of her developing skin issues. Im brand new to hairless rats. Is there anything special I should know? Should I make her wear sunscreen when we are outside? What kind of sunscreen?