Thank you for sharing your heart so openly about your sweet puppy and the difficult news you received. The love and tenderness you have for her is clear, and it is right to bring that love before the Lord in prayer. God cares about His creation and He sees the compassion you show to this little life He made, and He also sees the heaviness and uncertainty you are carrying as you make hard decisions on her behalf.
You mentioned not knowing if radiation is the right path and wanting above all for her not to suffer and to have good quality of life. That desire for what is truly good and right is where wisdom begins. Scripture teaches that wisdom starts with a reverent awe of God, a humble respect for who He is, His power, His love and His goodness, and with a turning away from evil. It is not simply having more information, but knowing how to use knowledge well. That kind of wisdom is more valuable than silver or gold or anything else we might desire, and God promises to give it generously when we seek Him for it.
The Bible encourages us to seek for wisdom and understanding as we would seek for hidden treasure, to cry out for it and search for it earnestly. When we do, we find that God Himself is the source. Out of His mouth comes knowledge and understanding, and He holds sound wisdom for those who walk uprightly before Him. He is a shield and He watches over the paths of His people. In Jesus are hidden all the treasures of wisdom and knowledge, so to seek wisdom is really to seek Him and to listen for His voice.
For your situation, that means bringing every decision to Him and asking for His pure wisdom. The wisdom that comes from above is first pure, then peaceable and gentle, not marked by confusion or striving. It shows itself in a life that seeks peace and mercy. As you talk with your veterinarians and consider treatment, you can ask the Lord to give you that kind of clear, gentle, and pure discernment, to help you weigh what will truly give her comfort and dignity, and to give you peace about the steps you take.
It is also good to remember that while God loves and cares for every creature He has made, Scripture speaks of being children of God in a special way concerning people who are made in His image and who are brought into His family through faith in Jesus Christ. Your puppy is a precious part of His creation, entrusted to your care, and your kindness to her reflects His own compassionate character. He understands your grief because He is full of pity and mercy toward those who suffer and those who love them.
I will pray for you and for your little girl.
Father, thank You for Your creation and for the gift of this dear companion. You know her by Your care for all You have made, and You know the hearts of those who love her. I ask that You would grant wisdom and understanding to her owner and to the veterinarians who are helping make decisions. Give clarity that is pure and peaceable, and guide them toward what will most protect her from suffering and give her the best quality of life possible. Comfort this heart that is hurting, take away fear, and fill it with Your peace. Help them to rest in Your goodness and to trust that You are a shield and that You preserve the way of those who seek You. Whatever the outcome, let Your love be felt and let Your wisdom lead every step. In the name of Jesus I pray, amen.
May the Lord draw near to you in this tender time, give you wisdom for each decision, and surround both you and your sweet puppy with His gentle care.