One of our guinea pigs has an unusual habit at the water bottle. He'll go up, start to drink as usual, and begin rubbing the tip of his nose around the bottle dropper, then rub his hole face around it. It's hard to explain, it looks like he's trying to kiss it passionately! He does it every time he drinks, not just when it's freshly washed, so I don't think he's trying to put his scent on it, but I'm not sure.
Any clue? The other GP doesn't do this!
Any clue? The other GP doesn't do this!