Kaley Cuoco has been left devastated after the death of her third dog. The 'Big Bang Theory' actress - whose pet pooches Petey and Chester died earlier this year - has taken to Instagram to reveal that her pitbull Angel passed away recently. In an emotional tribute, Kaley wrote: "Rest in peace, Angel. My heart is so heavy right now. This dog was more human and true than any of us. She exuded love and forgiveness and is the reason I fell so in love with pit rescue- this dog paved the way for pits everywhere, and showed the world what rescuing a pit bull really means. Her memory will live on in all the hearts she has touched..... @rebeccacorry #rescue #adopt #standupforpits (sic)." In January Kaley was heartbroken after two of her dogs died within days of each other. While the actress was still mourning the loss of her pet Petey, who she had for 14 years, she was left "in shock" when another beloved pooch, Chester, suddenly passed away. Kaley wrote on Instagram: "It hasn't been a great week for dogs so with a heavy heart I must tell you, sweet Chester (aka Chedder cheese) has passed away. We rescue these angels blindly and have no idea what problems they may have.. I'm still in shock but I just keep feeling blessed to have him in my life even for a small amount of time. He was such a joy- hilarious ears and followed me everywhere I went. He loved people so so much- loved being held and cuddled. Slept right on my pillow every night. I can sleep knowing that he felt extreme love towards the end of his life. Thank you @pawworks for blessing me with the big eared wonder .. (sic)."