He may have a urinary tract infection so you may want to follow him around with a ladle to get a sample into the vet for a check.
Otherwise he may be showing excitement urination. You can manage that and usually they grow out of it.
Submissive and Excitement Urination in a Puppy
MACH3 Bretta Lee Wildhaus MXG MJG MXF MFB TQX HIT CGC TC
Glory B Wildhaus AX, AXJ, XF
plus Miss Osin Blue Wildhaus
"How is it one careless match can start a forest fire, but it takes a whole box to start a campfire?." ANONYMOUS