Will this forever effect my dog towards other small pets? (Please read everything. SUPER important.)?

So I have a Siberian Husky. He'll be 2 in April. He was the ideal dog when we first got him. But after reaching sexual maturity he showed a bit of tension towards my 9 year old male Yorkie, which is completely understandable. The tensions started off as a little staring and eventually growling. Then they became little nips towards my Yorkie. So, I sought help. My aunt helped me with the tensions between them and they became good pack members.

Here's where the problems rose up again.

Not too long ago I had rescued an injured duck. A Mallard, to be exact. Male. At first, they all lived in harmony. Except for the occasional beak from the Mallard towards my dogs. But the dogs never responded to it.

I wound up landing in the hospital for a week due to asthmatic bronchitis and when I returned home, my dogs were unruly and uncontrollable and all three of them had grown issues towards each other and towards the Mallard. (By the way, my third dog is a 2 year old female Labrador Retriever/American Pit Bull Terrier).

When I came home from the hospital, first thing I did was bring my dogs back into harmony with each other. The female took to it greatly and had no issues with the males and vice versa. But for some reason, I couldn't bring the males to live peacefully with each other again. No matter how hard I tried, they always had little stare downs.

Here's my main concern;

Just yesterday morning when I left to Brooklyn with my mother, my father let the Husky and the Lab mix out to the yard for some morning relief. All was well until about 15 minutes afterwards. My Husky found his way into the pen where we kept the Mallard and attacked and killed the duck. As much as I hate to admit it, it wasn't play. It was an attack. The duck had multiple bite wounds on the back, underside and wings, and was bleeding profusely. My father even noted that he saw my Husky tossing the duck around and his jaws were blood-stained. My father retrieved my Husky and sent him into the house. He brought the Mallard in and tried to help it, but it was obviously no use.

The Mallard was buried this morning.

However, yesterday when he brought the Husky in, the first thing my Husky tried to do was attack my Yorkie. His hairs were up, my father said there was a deep blood-churning growl, and he literally lunged at my Yorkie, jaws wide open. If my father hadn't reacted in time, my Yorkie would probably be in the same place as my Mallard is now.

I guess what I'm trying to ask is as follows;

Will that attack and kill of the Mallard drive my Husky into, shall I say, madness? I mean, I've heard that if a dog gets the taste of another living thing's blood it can make him blood-thirsty. While I never believed that ever, I'm starting to now. I'd never heard of my Husky trying to attack my Yorkie the way my father said he did. To top it off, my Husky hasn't had any shots this year. I know that's a bit irresponsible. Please don't bash me for it. But, money has been tight lately and we just couldn't afford any shots at the moment.

This is the first place I thought to check without getting any serious attention drawn towards my dog about this.

Please help me.

Thank you.