I'm so sorry, what a terrible experience. Here, we would suspect a fox, they will kill a lot of birds in spring, especially if there are kits, They take them away and lightly bury them and eat at their leisure over the next weeks letting the bodies ripen.
If you have the heart for it, you should be able to fnd the burial sites which will be along their food trail. I'm also sorry to say they will come back for more, they tend to clean out a site and store food to raise the kits before moving on. I sue hope you can improve your biosecurity, I can only imagine your pain.
If you have the heart for it, you should be able to fnd the burial sites which will be along their food trail. I'm also sorry to say they will come back for more, they tend to clean out a site and store food to raise the kits before moving on. I sue hope you can improve your biosecurity, I can only imagine your pain.