These are awesome for cold weather areas. We use our all the time starting in November--it's also great as a bird water source in the garden as they have no water in the sub zero weather we have in Michigan

Pros: great for cold weather

Cons: none

These are great bowls they ensure water to outdoor dogs or other animals. Can't imagine not having one for Michigan

Pros: great for a water bowl

Cons: needs electricity to work

These are wonderful if you provide for your pets outdoors in freezing weather--hopefully they aren't out very long but if they are this is a must have!

Pros: needed

Cons: none

This is great for outside animals. Keeps the water fresh and keeps from freezing in the cold weather.

Pros: great for outside pets

Cons: none

We use this in our chicken pen so our chickens never run out of water.

Pros: Does not need electricity

Cons: None