[nvnvgirl]

Max is now almost 3 yrs old and neutered. He's completely housetrained (he's VERY good and only will go in the house if he REALLY has to go and we are asleep and don't wake up when he needs to go out which is very rare).
We were at a party last weekend and there was another male yorkie there. I know that that Yorkie is not neutered (the people for some reason don't neuter their Yorkies ....they only have one but they told me the one they lost at 14 or so yrs old had never been neutered either). Anyway......not too long after we'd gotten there, I saw THEIR dog jump off the sofa, run over to a club chair and lift his leg on it, peeing on the chair and the white carpeting (this was at a friend's house). I discreetly told the host what had happened so he could clean it up before it was totally stained, but later on, I saw a little puddle near the front of the chair, and I suspect Max of doing that, although, I never saw him do it.
Is it normal for a male who's been housebroken to 'mark his territory' when another dog has? It made me feel so bad, and I hope Max isn't picking up a bad habit! Not that he's really around other dogs inside a house, but is there anything to prevent this, or is it just a WATCH really closely type of thing when you're somewhere with other dogs?