No I haven't witnessed this exact behavior but Storm would hide behind things to get closer to Sunny before they became friends. It was as if he was stalking him. He was so curious and interested in Sunny but he would hiss and spit at him too. He finally gave in and started to play with him. It only took three days. After that Pepper gave in on day five. All three have been best friends ever since. They fight occassionally like siblings do but their is a very strong bond and love between them.