Boy, I hope you don't eat meat, use a leather saddle, use cosmetics (have been tested on animals, if not now, the basis of all current cosmetics, shampoos, etc., have been animal tested), use medications, use bug spray, etc.
OK, it stinks when things are killed. Life is life. But, I don't believe the worth of an animal's life is equal to the worth of mine, or any human's.
Good for me, don't do any of those things. The only thing I have to admit to is that the old saddle that I bought fifteen years ago (second hand at the time also) still hangs in my barn. But I am retired and on a limited income so cannot go and buy a new one. But if I could, synthetic is the way I would go. As far as my riding goes, we no longer do the riding arena practises, instead choosing to just trail ride in our neighborhood and I usually lead my second horse as we go so it is more like going for walks just to break up the monotony. My horses have a pretty good life. And when they finally die of old age, the saddles will be destroyed not passed on to someone else.
I don't use anything that has been tested on animals, nor do I use any eggs or dairy and definitely don't eat flesh. And when I say good for me, that is true in more ways than one. My risk of heart disease is waaaay down, as well as various other illness including cancer. Because most processed foods contain animal products of one kind or another, I eat far less of those as well and instead eat more fresh vegetables and fruit and beans and legumes and nuts which are loaded nutrients and fibre. My weight is now down to a very healthy level (without "dieting") 5'4" and 120 lbs. and it is stable without me having to control it. It just is.
One day long ago, I looked at my horses, at a little bunny that we had, my dogs, and knowing home much I loved them and delighted in their being, I realized that to butcher them or anything like them, was a travesty that I could no longer be involved in. I became a vegetarian for many years from that point on, and about a year ago, extended that to embrace veganism. The absolute hardest thing about being a vegan is seeing how people continue to use animals without thought to their feelings and pain. That tears me apart.