With cats
It’s never, “we wanted one litter” “or we thought she would make a good mum” even though these are awful excuses its always “she got out before we could spay her and we didn’t know she was pregnant”
Someone I know, her cat has just had kittens. I haven’t said anything as it’s none of my business, but I know this would be her excuse
Seriously, spay your cats! They can get pregnant from 4 months of age. That isn’t fair to what is essentially a teenaged mum. Vets will spay from 4 months. No need to let her have a season unlike dogs
Neuter your toms. They will roam for miles fighting other males if left intact. They will stalk females and yowl for them.