I am sorry if you have lost a loved one, I.e. a pet. I too, just recently lost my pet of 6 yrs.
I know it hurts, but this is what we must come to understand & accept & have patience with, nothing belongs to us, it belongs to The God. This is why when there’s a death or one hears about a death, The God says we should say:
(To The God we belong & to Him we shall return) (The Holy Quran)
Then, He further States:
(The Messenger of The God said: The God (Mighty and Sublime be He) says: My faithful servant’s reward from Me, if I have taken to Me his best friend from amongst the inhabitants of the world and he has then borne it patiently for My Sake, shall be nothing less than Paradise. (It was related by al-Bukhari)