How can I convince my cousin that she needs to re home her dogs?

She has this poodle and cocker spaniel that she bought for her kids a couple years ago. She had another poodle who got lost a couple months ago. Anyhow, these poor animals are totally neglected! They’re covered in fleas and matts! They don’t ever go out for walks and they hardly even have human contact. The other day my youngest cousin came over asking for dog food because he didn’t have money to buy them any.
When they still had the third dog I talked to my cousin and told her she should re home those poor dogs but she responded by saying that her kids would probably throw a fit and she rather not do it. I don’t know what to tell her to make her let go of these poor animals. They’re living a miserable life and she doesn’t seem to want to make any changes.
I would hate to do this to my own cousin but I might end up calling animal services on her.