I sometimes have to hit my dog and I feel bad about it
Why do you think that you have to hit the dog?
Because it seems like it enjoys getting hit and I don't want to risk injuring it
Well I agree that hitting is wrong. I feel bad when I have to swat their butts too. It is normal to feel bad because it is not fun to hurt them.
I don't want to feel bad about it, I want to watch them wag their tail.
I think that you feeling bad about it is normal. It shows that you have a concious if you feel bad about doing bad things.