My chihuahua recently saw another dog lift his leg to pee and mark his territory, until this he had never lifted his leg to pee, always stood on four legs. He used to have accidents but now it seems intentional, frequently peeing on legs of tables/chairs, dirty clothes, etc. Is getting him neutered the only solution? I "yell" as the trainer once told me to scare him from peeing in a certain spot, but it doesn't seem to help. He stops at the time but then does it again later.
Please help!

Funny story about how it took a whole town to catch a feisty little chihuahua. This is the last paragraph of the story.

Elusive Chihuahua captured near Ore. prison 9/27/2007, p.m.

PENDLETON, Ore. (AP) — It took a prison employee to capture an escaped Chihuahua.
He donned two pairs of leather gloves and grabbed the dog.

"It was a battle," he said. "It was hissing and growling."

But the Chihuahua wasn't ready to surrender.

Hildebrand took the dog until another rescue worker could transport her back to Idaho. She placed her within a six-foot chain link fence and reinforced the gaps to prevent an escape.

It didn't quite work. Hildebrand and her husband, Gary, left home for awhile. When Gary got back he noticed the dog running free on the couple's five acres. He called his wife.

"He said, 'The Chihuahua is loose,'" Hildebrand said.

She raced home to find her husband in hot pursuit. The dog aimed her body toward an outside fence and started digging."The dirt was flying," Hildebrand said.

Just as the dog was squirming through the opening, Hildebrand dove.

"I hung onto her legs, yelled to Gary to bring the crate and just laid there with both me and the dog gasping for breath," Hildebrand said.

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My husband and I are driving from Kansas to Wisconsin we are only staying in WI for a couple hrs to pay respects to my dad then driving straight across to northern Minnesota, how can I keep my 3 lb chihuahua warm and confortable in the car when we have to stop and stretch our legs, eat, potty etc and how can I make sure he is relieved on the road he is paper trained otherwise and has been known to NOT go potty unless there is paper Im afraid he is going to hurt himself by not going or have accidents in the car and he will NOT do a kennel I have been trying to kennel train and he litteraly screams and gets very upset (he is just a baby 5 mos old) to keep him warm I do sweaters and t shirts also he does have little coats two winter coats for when he is outside but he still shakes a ton and in the northern states it is sub zero right now so I just want to make sure he is extra comfortable and happy on this trip