"Anyone who knows me, knows Petey," Cuoco, a noted animal lover
, wrote. "He was basically the first dog I ever had... I was gifted him on my sweet 16, by my bf at the time... I was afraid I would get in trouble so I hid him in my bedroom for 3 days until my parents found out -- they said I had to take care of him if I was to keep him, that he would be mine! I was so excited!!"