Sweetheart you know What you will eventually need to do - the thing you don't know is When you should face it or If you can bear it.
Sooner or later is really up to you. I am the one who has always taken our animals to the vet at the end, or called the vet. Even in my very early teens, so I know from a lot of experience what you face and my heart goes out to you and I hope some of the strength I've had to find.
For me it's a gift that I can finally ease their pain, and I know that it will be as heart breaking this week as it will next week.
Here are two different experiences I faced. This one was when I called an animal communicator to ask when, I didn't want to cause pain or suffering more than what was already happening, but I hadn't reached that state of "just knowing that today is the day" but it was so difficult that I felt it would be better sooner than later, this was a horse with a broken elbow caused by an owner disrespecting instructions for safe introductions into my herd, and doing her own thing when she knew I was off the property... The animal communicator said that she was told - "there is no further lesson or value in my continued being here, I would leave". And so I arranged the vet to call that afternoon. This experience gave me a great sense of relief to end suffering sooner.
There is an experience I'll share with you, even though it will probably cause you to cry...This was our dog child Pip, who like Pedro had had a tumor removed and it had grown back and spread... there was a time one day that she looked at me in a way that I 'just knew' the time was the Time and I put it off because, because, because and then I had this strange experience where I was thinking of her still asleep in our bed and I heard in my head as clear as a bell her pleading, when I looked she had begun to bleed to death. We were at the vet 7 minutes later. I feel so guilty to this day that I made her endure 3 more days when I had already reached that stage of absolutely just knowing, I should have found a way to make my husband face up to the inevitable, but it was his first ever animal who he loved completely and he did not want to lose her. I knew what it takes and I felt that this was a first in a life-time event for him and that he should live it. Of course I made the fast decision to go to the vet, but I let him decide and instruct the vet once we were there. The vet said that with high intensity nursing we could get another 6 months out of her at the most. My husband could not make her go through with more of it for the sake of his holding her. So he decided then to release her, at the stage she was at.
Then I will leave you with one last experience, this was a drastic situation, a horse had been poisoned with pesticides I did not know had been sprayed in her paddock, her hoof capsules started to part from her feet. I wanted to put her down to end her suffering, but I had the strongest feeling inside me that she did not to go, was not willing to be put down. I called another animal communicator, and they told me that she said her gift to me was the level of learning and understanding I would achieve by committing and seeing her through this, she did not want to go and she said she would come through it with difficulty but very well. Everyone was telling me that she could not survive and I should put her down immediately. Everyone but the horse that was... you know what - she came through, she did it with grace and dignity and 10 years on people still speak in awe about her, those that had a hand in her rehabilitation.
And she did gift me something nothing else could have given, in this case I had to go against what everyone else was saying and just listen to and trust the horse.
Pedro purrs because he loves you, there is no doubt of the love between you two. Could you maybe think of giving him pain meds during the night? Or would that be too soon between doses? That is all I can think of that might help you face his mornings. Big hugs to you Dear and loves to Pedro. You are wise and right that no-one can tell you When, that is between you and you beautiful Pedro. But we are here to help in what ever small ways we can, with love.