As well as presenting the winners of the nationwide pedigree dog show and a special show for mongrel dogs, the "Hund und Pferd" convention is also home to the European 'dog diving' championship.
Anyone can enter their furry friend into the event, which sees dogs judged on how far they can leap from a diving board into a swimming pool.
An Australian Shepherd jumps into the water after a ball on Friday at the "Dog and Horse" convention in Dortmund. Photo: DPA
According to website dogdiving.eu, the sport was invented in the USA and is mostly practised in the summer, when dogs are happiest to cool off in the water.
Springt euer Vierbeiner gern ins kühle Nass? Dann auf zur Züchtermesse nach Dortmund! Vom 8. bis 10.05. kann beim PRO PLAN Dog Diving jeder Hund sein sportliches Talent unter Beweis stellen. Erste Eindrücke gibt's hier:Posted by PRO PLAN Deutschland on Friday, April 24, 2015
Each dog has a few minutes to make several tries at jumps from the board, which is between 15 and 20 centimetres above the surface of the water.
For the less experienced dogs, life vests are also available.