I have been searching for this movie on and off for 10 years. It’s an animated film, but more like a Japanese style animation. I watched this movie around 2005 ish but may have came out before. All I can remember that it was about a magical talking white dog who could only communicate with a girl. I think that if they told anyone their secret about the dog being able to talk he would lose his power and turned into a normal dog. And i think she end of spilling the secret so the dog lost his power and there was a scene where his soul or pink bubbles or something starts appearing and the dog loses his power. And there was another scene where it was raining and the girl was trying to find the dog. I don’t quite remember since I watched it when I was around 6 years old. The ending was really sad though the reason why I want to search for it is because it affected me so much emotionally when the dog disappeared and now it’s just a normal dog barking.