eminent loss

Not a diet or exercise related post, im just feeling so intensely sad over having to make the descision to euthanize my dog. Shes a boxer and is the now 11 year old " puppy" from our first litter. Her mom and dad are both gone now. She will be the fifth dog ive had to make the heartwrenching descision of ending her life. I so wanted her to just pass peacefully at home but now know it wont be in her best interest to wait it out. I know were all going to go one way or another and theres not a good or better way. And shes had a great life and all,but it just sucks ,she has a mammary cancer that has spread like wildfire on top of a heart condition that has keep us from being able to do surgery. And this all possibly could have been avoided if id had her SPAYED. So please if anyone reading this has a female puppy dont wait to have her spayed do it as early as possible ,google it look up how much it increases their risk for not only this but also pyometra which is a life threating infection of the uterus. She had that 8 months ago and was saved with emergency surgery. Our pets look to us to take care of them and I just feel like a failed her on this, my male boxer is nuetered so i just figured that was all i needed to do to keep her from getting pregnant but if their not going to be bred its so important to spay. Sorry if this is a downer but i need to get the message out.