No...
But it is very important to groom your horses. Especially before and after riding.
Yes. Horses are very sensitive.
The skin, which is actually the moist skin of the amphibians help them to breathe in water.
To prevent from drying out and to help assist in getting oxygen.
through it's skin
they use its skin to breathe
Yes, sea horses cannot be classified as mammals (no fur), reptiles (because of the skin type) or birds (for obvious reasons). They can also breathe underwater. Yes, they are classified as fish.
All insects breathe through their skin.
There are several reasons to groom your horse aside from the obvious one - to clean it! Horses can enjoy the massage - it is very relaxing for the majority of them. A good grooming after a ride can be a treat for your horse. Grooming also benefits a horse because it helps to distribute the oils in the skin and keeps the coat healthy and helps improve circulation.
Snails "breathe" through their skin and through an opening called the pneumostome visible on the right side of their bodies. Click the two links below that will help you out.
Animals that can breathe through their skin are said to have permeable skin. Amphibians and earthworms both have skin which is permeable to gases.
All insects breathe through their skin.
They breathe through their skin, their mouth lining, and their throat lining, provided they are sufficiently moist.