My girlfriend's father is giving their lovely dog away and nobody else is on board.

My girlfriend's father wants to give their lovely dog away, and the rest of the family does not.

I live in Greece, am 18 years old and my girlfriend is 17, 362 days apart. My girlfriend has two dogs, both female, let's call the 8 year-old R and the 1 year-old M. They have had R for 5 years, and they got M right around when M was born. Let's focus on R. My girlfriend's father is the owner of the two dogs, and he uses them to go hunting. They are spager spaniels. From what my girlfriend has told me, he is legally allowed only two dogs in his property, but he wants to get a new one. He is planning on giving R away, a lovely dog who has been part of my girlfriend's and her 3 younger sisters' lives for the past 5 years, in order to not land himself outside the confines of the law here. Now, I have been in a similar situation before, when I was 11 years old, and I remember the grief to be greater than that over any family I have lost either before, or after the fact. Her father told my girlfriend a day before this post, that he would not end up giving R away. But today he has changed his story, and told her he was lying. God knows why..... What I am asking for here; Is there a way to legally force him out of giving R away? Maybe something to do with the fact that R is a part of the rest of the family too? That is what I would kill to know right now, and I will do everything in my power to keep him from making his family suffer even more. He has generally been a world-class a-hole for various things. Please help me if you would be so kind. I love my girlfriend. I love R. I can only imagine the loss that they may experience.

Location: Greece