I know where you are coming from.
I have two cats, now aged one and a half, both of which were rescued as small kittens. I found one of them at the age of two weeks and, as you have described, I fed him with formula from a bottle and then had to rub his private parts so he could go to the toilet.
Yet, if I spot a flea on one of them, I apply flea killer to both of them immediately to get rid of them.
The hypocrisy is not lost on me. On the one hand I am prepared to rescue these cats, but have no worries about killing the fleas on them. Yet, fleas and cats are both living creatures!
As for meat, yes I eat it.