What injured my duck and chicken?? Help, please!

[sky's the limit]

We have some ducks and chicken, and 2 of them were injured today, but we're not sure by what. It happened during daylight hours, towards the end of the day. One was a buff orpington (about 3 1/2 or 4 months old)...it had one of it's wings ripped off. The other was a Cayuga duck, about 5 months old. One of it's feet had been ripped off, but the drum and thigh was still attached (the drum was in bad shape towards the bottom). The birds had no other damage or injures.
Does anyone have any ideas of what could have causes this sort of damage? I worried for the other chickens and ducks we have here, but I'm not sure what to do until I can figure out what caused it.

 

[ZepChick]

maybe a bird of prey? are your birds enclosed?

 

[sky's the limit]

They are not enclosed, but I've never seen a bird of prey in our area (of course, that doesn't mean they aren't there).

Oh, and this is the first time we've had any injuries in our flock this year (this is the first year we've had them).

The strangest thing is that we were around quite a bit today - our sheep pen is next to the pen where the birds are, and we were trying to catch up on some of the sheep chores! ...usually we're not in the area where the birds are during the middle of the day much, but today we were there for a while in the morning, afternoon and evening. I would have expected to have a problem on a day that we were not around, rather than a day when we were there.

 

[BBRedCigar]

Sounds like a fox. Where about are you located?

BBRedCigar

 

[sky's the limit]

In Nova Scotia, Canada

 

[barredrockmama]

I'm thinking a fox or racoon. They are brutal.

 

[sky's the limit]

Would they do their damage during the daytime?

 

[BBRedCigar]

From my experience, a fox is bold and even bolder at night. Did you find the wing or foot?

 

[sky's the limit]

No, haven't found either the foot or the wing. But I realized the duck was injured when I was putting them in their pens tonight, and it was already getting dark out - there was no way I would have found his foot in the dark. If it was there, I'm sure it'd be gone by morning. Didn't have a chance to look for the chickens wing until after dark either, so we haven't found them.

Could a domestic cat have done this kind of damage?

 

[BBRedCigar]

I have seen many cat kills, and to me it seems they always leave the feet and wings alone. Any puncture or scratch marks?