guys after going through this forum, I came to know many have lost their pets due to cancer. Can anyone please tell me whats the reason behind it? I am a 1st time dog owner, having a cute female GSD 1yr old, I just wanna give her the best. Is there any way we can prevent the cancer. After going through this post, it made me more worried. Everyone have faced their lovable pets loss I am more scared about that. I dont want to loose my baby soon. PS- yet I have not spayed her. She got her 1st heat. Also in dilemma whether to spay her or mate her for 1 time ( just dont want to end her generation) Not sure about it. Please give your advice on this too.