If you are in the very sad situation of having to let your animal go, I can offer practical and emotional support. If you are having to face having your pet pts it can be wonderful to give them a healing treatment before they pass so that they are in a place of calm and acceptance and it will help make the transition easier for them
One consolation is that animals don't perceive death in a negative way in the way that we do, it is a natural part of the life's cycle but they won't want to leave their beloved guardians behind and will sometimes try and struggle on regardless of their pain. Sometimes it is necessary to give them permission to go. Animals understand what you are saying as they can read the energy vibration behind your words. One of the greatest gifts you can give them at this time is to perhaps acknowledge that they are ready to leave the World and make it as gentle and peaceful for them as you can for their final journey.

How you plan their passing, after you have had to make the very sad decision to euthanase them is, from my own experience, very important to help you accept their loss. By celebrating their life and doing all you can for them at this time and making it a beautiful experience can help bring peace, acceptance and closure.