My birds laid eggs, but every morning when I went to see them, they were all gone. Will they be eaten by mice? But my family lives on the fourth floor.

What kind of birds do you have? If it is a bird, it can't be eaten by a mouse. Rats will eat your bird together.

Your bird should eat the egg by itself. There are two reasons.

The first possibility is that your feeding method is not very scientific, which leads to calcium deficiency in the female bird. In this case, it is very common for female birds to eat their own eggs, so the first reaction of experienced breeders when they hear that adult birds eat their own eggs is calcium deficiency. The response method is also extremely simple. Go to the drugstore and spend 3 yuan to buy some cuttlefish bones and put them in a cage. It won't happen next time. If you are reluctant to spend money, the effect of drying egg shells in cages is the same.

The second possibility is that you are excited to see birds breeding and often go to see them, but your bird's nest belongs to a dark nest, which is box-shaped and the light inside is very dark. Your frequent observation makes the big bird very uneasy and eats bird eggs under great pressure. The response is also simple. Don't disturb your birds, let them hatch and breed in the nest. If you want to watch it, the frequency should not be very high, and you should watch it every other day at most.

The above is the most possible, of course, other possibilities are not ruled out, for example, your birds are not a pair, and one lays eggs for the other.

I hope I can help you, and I hope to adopt it!