Why Did Zeus Have To Die?

I stood alone in the silence of the trailer… My child was asleep on the couch. No one or nothing but my sobs were to be heard. I ached from within. Why did Zeus have to die? Why did he not listen and stay put as he should of? How would I explain to my little boy his puppy was no longer with us, but on into a different life now?
I heard my husband coming down the drive in his rattling old red pickup truck… Normally when he came gravel was flying up behind him and Carter was outside screaming with excitement that Daddy was home. That wasn’t the case today. I quickly washed my face under warm water to try and relieve the red puffy eyes I had from crying. I peeked out the window to see my husband slow as a slug exit the truck... Not looking once towards the trailer... He grabbed his 22 out of the pickup and placed it in the storage box. He reached down and touched Zeus’s leash, and I watched as a quiver of sadness exited is manly figure. He looked so tired, His icy blue eyes didn’t sparkle, his broad shoulders sank low, and his happy cheeks seemed to have disappeared altogether.
We were heading down to my parents’ house for the weekend. I felt so guilty within. Why hadn’t I just persuaded Zeus to stay put? If I would of played with him more maybe he would of never snuck away and gotten into the farmers chemicals. I can still feel the burn of my hands as I tried frantically washing it off his soft coat of fur. I sat in the passenger’s seat remembering those sad eyes looking at me. He knew he was dying… I looked at my husband who was concentrating on the road; I got a flash back of him gently stroking Zeus and hugging him close before he took off to the fields with