I don't think they sense your sickness exactly, but they might notice that you smell a bit differently, that you move more slowly or are weaker than usual, that you make sneezing and coughing noises when you normally don't, and that your body temperature is hotter than usual. They don't know you are sick, they only know that you are different.
Dogs can get really sick if they eat candy especially chocolate. Many foods that are made for people to eat will upset a dogs stomach, if you want to know exact foods that just depends on your dog.
Barkworks is a pet store. They did have their problems and sold a sick dog but they fixed the problem and it just happend that one time. It was just an accident. So I say no.... Barkworks does not sell sick dogs.
If you have over 1 dog and one of them is sick and not the other one(s) then it got around or ate something
If your dog is not moving, he is probably resting, sleeping, or maybe isn't feeling well. Offer your dog something that you know he likes. If he still doesn't get up, there might be something wrong.
Cats and dogs have a advanced body language, by using it on a human the answer is yes
I THINK dogs do know when your feeling bad because when I'm upset my dogs come over and try to comfort me.
Eat.
That is not good. Unless you know you are sick or something, you should go to a doctor to find out why this is happening, as blacking out and feeling really sick are not very normal.
Yes. Sometimes they know before you do.
Yes when a dog throws up the dog is sick like humans because when we throw up were sick. You can also tell if a dog is sick by feeling their noses, if it's dry they're sick.
yes dogs can get sea sick but only a few dogs do
Depends on why they're sick. They can carry and spread viruses and such.
You will feel sick.
Yes, dogs can get sick at any age, even if they are young and old.
Well since you didn't tell us why you're feeling bad for your brother, I don't know what you should do.
Yes. I usually catch my dog eating it, that's when i know shes sick.
Dogs eat grass when they are feeling sick. The grass goes down in there stomach and then they throw the grass up, along with some other stuff that might be toxic. Hope this helps! (: