My female frenchie has a very high prey drive. We don’t have much vermin, and what we have stays close to the fence for a fast escape. I had worried when I started with quail, that she would go after them. But she has never tried to get any in the brooder, which she can easily reach. I don’t put lids on until they are able to fly a bit, and she has never taken any. All 3 of my dogs like to watch the quail show tho, and they stare at them for hours. Outside, she also shows interest, but I had one fly out a couple weeks ago and she leapt right up and picked it out of the air, and held it down with her paws. The bird was missing a bunch of tail feathers but was otherwise unharmed. I think she determined the birds are mine, and she should be careful of them. The male frenchie has no prey drive tho, he would never harm one of the birds, but I don’t think he would harm a mouse or rat either. I think females have more natural talent for hunting.