Do robins make cats sick?

Going back to robins. There aren't many left in my garden. I have had three of them. Celia knows about two of them because she found the complete corpses. She was very upset. She doesn't seem to mind about hedge sparrows but dead robins really distress her. She was even more upset when she found some feathers and a long thin leg which looked like a robin's leg. She assumed (correctly) that I had eaten the rest of the bird. Was it a robin? I really can't remember. My interest in birds is a foodie one, not a taxonomic one. Some species taste better than others, of course, but I can't say I take much interest in the differences otherwise. So I eat some and I don't eat others. Depends partly on my mood and what else I have eaten that day.
I do not eat shrews - ever. Foxes and weasels and stoats may eat them and I suppose if I was starving I might manage a nibble. The problem is that they taste awful. There are fatty glands on their flanks which produce a vile secretion. It's stuff to mark their territory as they pass through the grass. Read by another shrew it says "Keep off. This territory already has a shrew in residence." Of course if the shrew is male, and a female is passing by, she might take a sniff and think "Handsome fellow. Might stop for a bit of rumpy pumpy." But to me the smell simply says: "Don't eat me. I taste bad." That's good news for the shrew, of course.
So do robins taste good? I may have eaten one and I have certainly caught two others. Celia says that it might have made me sick even though she can't remember that particular pile of sick (there are quite a few). If any of you cats out there have eaten a robin (the English kind) please add a comment, remembering to say whether you sicked it up or not.