To Aurora77: If you are planning to own other pets in the future, and you would like them to have that surgery, you have to ask a question, with all the details. You can no doubt ask it from Rabbi Amar and in the same letter, you can also ask for clarification of his previous rulings. You can also discuss the alternate procedures that were mentioned, which involve removing blood supply and thus have organs atrophize: it is my understanding they are intended for use in the very specific situations I outlined, in order to minimize violation in those cases in which it’s permissible to do. But of course I am no rabbi and I would never presume to teach. On the other hand I can tell, because I have seen people do it, that cats and dogs, and other animals which are kept for utility (bulls, horses, etc) or as pets, can have a long, healthy and happy life without being subjected to the surgery.
To The Chassidishe Gatesheader: I am sorry, I did not write the Torah. And the reason I would never willingly help in neutering or spaying pets is not that I find it cruel, it is that it’s forbidden. Moreover, I was taught we ask a question from our Rabbi and then we do what he tells us. I am willing to believe that’s exactly what you did, and that you were told you are allowed to spay and neuter all your cats, both males and females. But this does not completely help, because that’s not how I was taught. So, when I see a sick or wounded stray cat and I know I have the option, say, of making a phone call, you bet I won’t be calling anyone. I could tell stories about how a chiloni veterinarian agreed to something (and money was paid to secure that), then some person talked the vet into doing the surgery without notifying anyone, using a load of lies about it being permissible and a kindness to animals. I wonder if you would have an excuse for that, or if you find it as repulsive as I do.