Just like humans, dogs too can get sick. The change of weather, certain food habits, allergies and so forth can cause them to feel weary.Just like humans, dogs too can get sick. The change of weather, certain food habits, allergies and so forth can cause them to feel weary <a href="http://www.boldsky.com/home-n-garden/pet-care/2014/five-signs-to-tell-if-a-dog-is-sick-040430.html" target="_blank">Know More</a>.